The 12 Best Portable Chargers

The INIU 45W Fast Charging Power Bank is a premium portable charger designed for users who prioritize compact size without sacrificing charging speed. This 10000mAh capacity unit targets busy professionals, frequent travelers, students, and outdoor enthusiasts who need reliable backup power but want to minimize added weight and bulk in their daily carry or luggage.

The standout feature is the combination of 45W fast charging capability with a form factor that is 40% smaller than conventional chargers. Real-world performance includes reaching 76% charge on an iPhone 17 Pro Max, 84% on a Galaxy S25 Ultra, and 60% on an iPad Pro within 30 minutes when starting from 20% battery. The detachable braided USB-C cable is a practical design choice that sets this unit apart, allowing you to replace a damaged cable without discarding the entire power bank. This approach extends the product lifespan and reduces electronic waste.

Build quality appears solid with premium materials and safety certifications that have earned trust from millions of users. The TSA-compliant design means you can bring this charger on flights without restrictions, and the nearly 2 full smartphone charges provide meaningful backup power for business trips, vacations, and outdoor activities. The included 3-year warranty and lifetime technical support reflect confidence in the product's durability and performance.

Potential drawbacks include the 10000mAh capacity, which is smaller than some competing models and may require multiple charging cycles for extended trips without access to wall outlets. Additionally, achieving maximum 45W charging speeds requires compatible devices, so older phones and tablets may charge at slower rates. The detachable cable design also means you need to keep track of the cable or purchase replacements if it becomes damaged.

Overall, this power bank delivers excellent value for travelers and commuters who prioritize portability and speed. The combination of compact design, fast charging, and practical cable flexibility makes it a solid choice for anyone seeking a reliable backup power solution that won't weigh down their bag.

Capacity and Output:

• Battery Capacity: 10000mAh
• Fast Charging Output: 45W maximum
• Charging Time: Reaches 76% on iPhone 17 Pro Max in 30 minutes (from 20%)

Design and Connectivity:

• Size: 40% smaller and 36% lighter than conventional chargers
• Cable: 0.4ft detachable braided USB-C cable
• Battery Technology: TinyCell high-density battery

Compatibility and Safety:

• Compatible Devices: iPhone, iPad, Samsung Galaxy, Google Pixel, Nintendo Switch, Steam Deck
• TSA-Compliant: Yes, approved for air travel
• Warranty: 3-year INIU Care with lifetime technical support
• Safety Certifications: Highest-grade materials with emergency backup capabilities

Ideal For:

• Frequent business travelers and commuters who need compact backup power for daily use
• Vacation travelers and cruise passengers requiring TSA-compliant portable charging
• Students and office workers carrying portable chargers in purses or backpacks
• Outdoor enthusiasts including hikers, campers, and road trip planners
• Gaming enthusiasts with Nintendo Switch or Steam Deck devices
• Anyone seeking emergency backup power for unexpected outages or power loss

May Not Be Ideal For:

• Users needing extended multi-day charging without wall outlet access (consider larger capacity models)
• Those requiring extremely durable cables (detachable design means cables can be lost or damaged)
• Older device owners whose phones cannot utilize 45W fast charging speeds

The YBYP 50000mAh portable charger is a full-featured power solution designed for professionals, travelers, and anyone who relies heavily on multiple devices throughout the day. At 0.75 pounds and measuring just 4.4 by 2.8 by 1.2 inches, it delivers impressive capacity without the bulk of traditional high-capacity power banks, making it genuinely portable for backpacks, carry-ons, and even larger jacket pockets.

The standout feature is the combination of four built-in cables (USB-C, Micro-B, and Lightning) paired with three additional ports, allowing you to charge up to five devices simultaneously. The 22.5W fast charging delivers real-world speed gains, reaching 55% on an iPhone or 60% on a Samsung Galaxy S25 in just 30 minutes. The precision LED display showing battery percentage down to 1% is a thoughtful touch that helps you plan your day without guessing when you need to recharge the power bank itself.

Build quality is solid, with reinforced cable connectors designed to withstand daily use and flame-retardant materials throughout. The eight-layer safety system, including overcurrent protection, overvoltage protection, and active cooling technology, keeps the device cool even during intensive fast-charging sessions. This engineering focus on safety and durability is backed by a satisfaction guarantee, which adds confidence to your purchase.

The main tradeoff is that this is a premium-tier power bank, so the cost is higher than basic alternatives. Additionally, while the built-in cables are convenient and durable, you cannot replace individual cables if one fails, though the manufacturer's guarantee addresses this concern. If you need a lighter option, slimmer 20000-30000mAh alternatives exist, but you sacrifice significant capacity.

This power bank is ideal for frequent travelers, remote workers, outdoor enthusiasts, and anyone with multiple devices who values both speed and convenience. The combination of genuine portability, fast charging, and integrated cables makes it a complete mobile power solution that eliminates the need for separate cables and adapters.

Capacity and Charging:

• Battery capacity: 50000mAh
• Fast charging output: 22.5W
• Charges iPhone 17 up to 9.1 times, Galaxy S25 8.1 times, iPad Pro 6 times
• Reaches 55% iPhone charge in 30 minutes

Design and Portability:

• Weight: 0.75 pounds
• Dimensions: 4.4 by 2.8 by 1.2 inches
• 30% smaller and 15% lighter than traditional 50000mAh models

Ports and Cables:

• Built-in cables: Micro-B output, USB-A input, USB-C output, Lightning output
• Additional ports: Micro-B input, USB-C input/output, USB-A output
• Total simultaneous device charging: Up to 5 devices

Safety and Display:

• LED display with 1% accuracy battery percentage readout
• Eight-layer safety protection: overcurrent, overvoltage, short-circuit, temperature control, and more
• Flame-retardant materials and active heat-dissipation design

This 56,800mAh portable charger is a robust power solution designed for anyone who spends extended time away from electrical outlets. Whether you are planning a camping trip, managing a multi-day business travel schedule, or preparing for emergencies, this power bank delivers the capacity and speed needed to keep your devices running reliably.

The standout feature is the combination of high capacity and fast charging speed. With 22.5W Power Delivery, this charger reaches iPhone 17 to approximately 60% in around 40 minutes, making it genuinely useful in urgent situations rather than just a slow trickle charge. The ability to charge any device 10 or more times before needing to recharge the power bank itself means you can confidently leave home without worrying about battery anxiety. The triple charging ports (two USB-A and one two-way USB-C) let you power up to three devices at once, which is practical for families, teams, or anyone with multiple gadgets.

Build quality reflects thoughtful design for outdoor and travel use. The LED digital display provides instant visibility into remaining battery percentage, eliminating the frustration of not knowing how much power you have left. The compact form factor fits standard backpacks and emergency kits without bulk. Smart power management automatically adjusts output current to protect connected devices from damage, which adds real value for expensive smartphones and tablets.

One important limitation is that this power bank exceeds airline carry-on restrictions due to its battery capacity, so it is not suitable for air travel. Additionally, the charger requires your own USB cables for operation, which may involve a small additional investment if you do not have compatible cables on hand.

This power bank is best suited for outdoor enthusiasts, frequent road trippers, remote workers, and anyone who needs reliable multi-day backup power. If you prioritize capacity, fast charging speed, and the ability to charge multiple devices simultaneously, this model delivers strong value and practical performance for extended trips and emergency situations.

Capacity and Charging:

• Battery capacity: 56,800mAh
• Fast charging output: 22.5W via USB-C Power Delivery
• Charge cycles: Approximately 10+ full charges for iPhone 17 or Galaxy S25
• iPhone 17 fast charge time: Approximately 40 minutes to 60%

Ports and Connectivity:

• Dual USB-A outputs
• One two-way USB-C port (input and output)
• Simultaneous multi-device charging: Up to 3 devices
• Compatible with iPhone 17/16/15/14/13 series, Samsung Galaxy S25/S24/S23, Google Pixel 9/8/7, iPad, tablets, earbuds, and all USB-powered devices

Safety and Display:

• LED digital battery percentage display
• Multi-layer protection against overvoltage, overheating, short circuits, and overcurrent
• Smart current adjustment for device protection

Design and Warranty:

• Compact form factor for backpacks and emergency kits
• 3-year MaiVoz Care warranty with hassle-free replacement
• Not suitable for airplane carry-on due to battery capacity

The Anker 25000mAh Laptop Power Bank is a premium portable charging solution designed for professionals, remote workers, and frequent travelers who need to keep multiple devices powered throughout the day. With three USB-C ports and one USB-A port, this power bank eliminates the frustration of choosing which device to charge first.

What sets this power bank apart is its impressive 165W total output and per-port 100W capability, allowing it to charge laptops like MacBooks at near-wall-charger speeds while simultaneously powering phones and tablets. The dual built-in cables are game-changers for travel: one extends up to 2.3 feet with 20,000 rated retractions, while the shorter 0.98-foot cable doubles as a durable carrying strap. This design eliminates the need to pack multiple cables, streamlining your travel kit significantly.

The 25,000mAh capacity provides genuine week-long power for typical usage patterns, and its 100Wh capacity complies with TSA restrictions, making it approved for airline carry-on travel. The protective pouch and 18-month warranty reflect Anker's confidence in build quality and durability.

The main considerations are that this is a larger, heavier device than ultra-compact power banks, and it performs best when paired with a 100W or higher charger for fast recharge times. Additionally, the premium price reflects its advanced features and multi-device charging capability. For business travelers, remote workers, and anyone regularly charging laptops and multiple peripherals, this power bank delivers exceptional value through reduced cable clutter and reliable multi-device support.

Capacity and Output

• Total capacity: 25,000mAh
• Total output: 165W
• Per-port output: 100W maximum on each USB-C port

Ports and Connectivity

• Three USB-C ports
• One USB-A port
• Supports simultaneous charging on all ports

Built-in Cables

• One retractable USB-C cable extending to 2.3 feet with 20,000 rated retractions
• One 0.98-foot USB-C cable doubling as carrying strap with 20,000 rated bends

Travel Compliance

• 100Wh capacity
• TSA-approved for airline carry-on

Package Contents

• Anker Power Bank (25K, 165W, Built-In and Retractable Cables)
• Protective pouch
• User manual
• 18-month warranty

The Anker 10000mAh 30W Power Bank is a high-performance portable charger designed for professionals, travelers, and mobile power users who demand speed and reliability. This device bridges the gap between ultra-compact chargers and full-sized portable batteries, offering genuine fast charging without the bulk.

The standout feature is undoubtedly the 30W fast charging capability. In real-world testing, users can expect an iPhone 16 Pro Max to reach 50% charge in approximately 27 minutes, a dramatic improvement over the hour-long waits typical with standard power banks. This speed advantage extends to the power bank itself through bi-directional charging: the 20W input means you can fully recharge the unit in roughly 50 minutes. For Samsung Galaxy devices, the S24 receives 1.94 full charges, while iPad and MacBook users benefit from the 30W output supporting larger devices.

Build quality and design reflect Anker's reputation for durability. The integrated 5.4-inch USB-C cable has been tested to withstand over 10,000 bend cycles, eliminating the common frustration of fraying cables after months of use. The device itself measures just 4.32 x 2.58 x 0.98 inches, making it genuinely pocketable without sacrificing capacity. The absence of a separate cable to carry is a practical advantage for minimalists and frequent travelers.

Potential drawbacks warrant consideration. Users with iPhone 14 or earlier models will need to supply their own Lightning cable, as the built-in USB-C cable cannot directly charge these devices. Additionally, while the integrated cable reduces clutter, it also removes the flexibility of choosing cable length or type. The premium positioning places this unit above budget alternatives, though the 30W charging speed justifies the investment for power users.

The Anker 10000mAh 30W Power Bank is recommended for anyone who values charging speed, portability, and build quality. It excels as a travel essential, a backup for professionals working away from outlets, and a reliable emergency charger for multi-device households. The 18-month warranty and responsive customer support add confidence to the purchase.

The YILANS 50000mAh Portable Charger is a powerhouse solution for anyone who demands reliable, simultaneous charging across multiple devices. This power bank is engineered for travelers, outdoor enthusiasts, families on extended trips, and professionals who work remotely and cannot afford downtime. With massive capacity paired with intelligent charging technology, it addresses a real pain point: the modern reality that we carry more devices than ever but limited charging infrastructure.

The standout feature is undoubtedly the multi-port design. Four built-in cables (USB-C, Lightning, Micro-USB, and USB-A) plus three additional ports mean you can charge up to six devices at once without hunting for cables or adapters. This is genuinely transformative for family travel or group camping trips. The 22.5W PD fast charging is equally impressive, delivering 55% charge to an iPhone in 30 minutes, which is three times faster than standard chargers. The USB-C port supports bidirectional fast charging, so the bank itself recharges quickly, minimizing downtime.

Build quality reflects thoughtful engineering. The compact form factor (5.6 x 2.9 x 1.1 inches) and lightweight construction (1.1 lbs) make this genuinely portable despite its enormous capacity. The LED digital display provides real-time battery percentage feedback, eliminating guesswork about remaining charge. The 12-layer safety architecture, including smart chip technology and intelligent temperature control, reduces overheating risk by 98% and protects against overcharge, overcurrent, and short circuits. All ports have been tested for 10,000+ cycles, indicating serious durability.

The primary drawback is the 50000mAh capacity itself, which exceeds FAA restrictions on airplane carry-on batteries. This is a significant limitation for frequent air travelers. Additionally, the power bank requires an initial full discharge and recharge cycle for the battery indicator to calibrate accurately, which adds setup time. The premium price point may also give pause to budget-conscious shoppers, though the feature set justifies the investment.

This is a premium power bank that delivers on its promises. If you need massive capacity, multi-device charging, and blazing-fast recharge speeds, the YILANS 50000mAh is worth the investment. It excels for camping trips, international travel, family vacations, and anyone whose lifestyle demands extended independence from wall outlets. The 24-month replacement guarantee and lifetime technical support provide genuine peace of mind.

The Anker Nano 45W Power Bank is a premium portable charger designed for users who prioritize speed, portability, and convenience. With a 10,000mAh capacity and advanced 45W fast-charging technology, this power bank delivers rapid power replenishment for modern smartphones, particularly the latest iPhone and Samsung models. It's an excellent choice for business travelers, remote workers, and anyone who relies on their devices throughout the day.

What truly sets the Nano apart is its thoughtful engineering. The built-in retractable cable eliminates the constant frustration of tangled wires and forgotten charging cables, while the compact design (16% smaller than standard models) makes it genuinely pocketable. The two-way fast charging capability is particularly impressive: you can charge your iPhone 16 Pro to 50% in just 27 minutes while simultaneously recharging the power bank itself in 2 hours. The smart digital display keeps you informed of battery status at a glance, and the 24/7 battery protection ensures safe, efficient power delivery.

Build quality is solid throughout. The retractable cable is rated for over 20,000 bends, suggesting durability that will withstand daily use without fraying or failing. The overall construction feels premium without unnecessary weight, and the flight-approved status makes it ideal for frequent travelers. The 24-month warranty provides additional peace of mind.

The main considerations are capacity and cable flexibility. The 10,000mAh capacity is adequate for topping up phones but may fall short if you need to charge multiple devices or operate without access to power for extended periods. Additionally, the built-in cable, while convenient, removes the option to use your preferred charging cable if you have specific requirements or preferences.

The Anker Nano 45W Power Bank is a well-engineered, reliable solution for anyone seeking a premium portable charger that prioritizes speed and portability. While it carries a higher price than basic alternatives, the combination of fast charging, compact design, and built-in cable justifies the investment for users who value convenience and quality.

The Anker MagGo is a slim magnetic power bank designed specifically for users who want portable wireless charging without compromise. At just 0.58 inches thick, it slides easily into pockets or bags, yet packs a full 10,000mAh capacity. This power bank is perfect for iPhone users (12 through 16 series) who rely on MagSafe, as well as Android users with Qi2-compatible devices or magnetic cases.

The standout feature is the 15W Qi2 certified magnetic charging. Unlike standard wireless chargers, the magnetic alignment means your phone snaps into perfect position automatically, ensuring consistent fast charging every time. The 30W USB-C port adds versatility, allowing you to charge a laptop, tablet, or second device simultaneously. Real-world performance is solid: the power bank delivers approximately 1.8 full charges to an iPhone 15 Pro, which covers most daily use scenarios.

Build quality reflects Anker's premium positioning. The metal frame feels substantial, the matte finish resists fingerprints, and the aerogel thermal insulation keeps the device cool during charging cycles. The included 60cm USB-C cable and 24-month warranty demonstrate confidence in the product's longevity.

The main drawback is Android compatibility. While the power bank works with Samsung S25 and other Qi2 devices, they require a magnetic case to achieve 15W speeds and magnetic alignment. Standard Android phones will charge, but at slower wireless speeds. Additionally, the premium price point is higher than basic power banks with similar capacity, though the magnetic technology and build quality justify the investment for iPhone users.

Overall, the Anker MagGo is an excellent choice for iPhone users seeking a slim, reliable magnetic power bank that delivers fast wireless charging without bulk. For Android users, compatibility depends on having a Qi2-certified or MagSafe-compatible case.

The INIU 10000mAh power bank is a genuinely compact portable charger designed for anyone who needs reliable backup power without sacrificing pocket space. Whether you are a business traveler, student, frequent concert-goer, or outdoor enthusiast, this ultra-mini charger solves the real problem of keeping devices charged while staying mobile.

What sets this power bank apart is its combination of raw charging speed and actual portability. The 45W fast charging capability delivers desktop-grade power delivery that can push flagship smartphones from 20% to 75-92% in roughly 30 minutes. That speed is backed by TempGuard 2.0 thermal management, which prevents your phone from overheating during rapid charging sessions. The nano-sized footprint, roughly equivalent to an AirPods Pro case, means you genuinely can slip this into a pocket, small purse, or backpack without noticing the weight or bulk.

The detachable, nylon-braided USB-C cable is a thoughtful design choice that extends the product's lifespan. Standard power bank cables fray and fail after repeated use, but this cable is rated to last 3X longer and can be replaced independently if needed. This approach reduces e-waste and saves you from discarding an otherwise functional charger just because the cable wore out. The cable also doubles as a convenient keychain attachment or backpack hook for daily carry.

TSA approval and flight-safe certification make this charger an obvious pick for frequent travelers. It meets all carry-on battery regulations, so you won't face confiscation at airport security. The universal USB-C compatibility covers iPhones, Samsung devices, Google Pixel phones, tablets, smartwatches, Nintendo Switch, Steam Deck, and other modern gadgets, making it a genuinely practical multi-device solution.

The main limitation is capacity: 10000mAh is solid for one full phone charge or partial charges across multiple devices, but heavy power users or those charging power-hungry tablets may find themselves wanting more. Additionally, charging speeds depend on compatible USB-C power delivery support in your device; older phones without this standard will charge at conventional speeds. Overall, INIU backs this product with a 3-year warranty and a track record of over 38 million satisfied users, making it a reliable choice for anyone seeking compact, fast charging on the go.

Capacity and Output:

• Battery Capacity: 10000mAh
• Maximum Output: 45W USB-C Power Delivery
• Charging Technology: TempGuard 2.0 thermal management

Physical Design:

• Form Factor: Ultra-compact, credit-card size
• Dimensions: Approximately AirPods Pro case size
• Cable: Detachable, nylon-braided USB-C (replaceable)
• Weight: Lightweight, pocket-friendly

Compatibility and Safety:

• Device Support: iPhone, Samsung, Google Pixel, tablets, smartwatches, gaming devices
• TSA Approved and flight-safe for carry-on luggage
• Safety Certifications: Premium safety standards
• Warranty: 3-year INIU Care with hassle-free replacement

The Anker PowerCore Slim 10000 is a premium portable charger designed for users who value portability as much as power. This compact battery pack measures just 5.99 by 2.81 by 0.61 inches and weighs a mere 8.6 ounces, making it one of the slimmest options in its capacity class. It's built for travelers, commuters, and anyone who spends significant time away from wall outlets but refuses to carry a bulky power bank.

The standout feature is the two-way USB-C port, which handles both device charging and power bank recharging through a single connection. This design choice eliminates cable clutter and simplifies your charging ecosystem. With 10,000mAh of capacity, you can expect roughly two full charges for an iPhone 15, nearly two charges for a Galaxy S23, or one charge for an iPad mini 6. Real-world performance depends on usage patterns and battery health, but these figures align closely with typical smartphone needs for a full day away from power.

Build quality is a genuine strength. Anker engineered this unit with scratch resistance and drop-test durability verified at 3.2 feet, meaning it can withstand accidental falls and the rigors of daily use. The compact form factor never feels cheap or flimsy, and the materials feel appropriately premium for the price point. The package includes a USB-C to USB-C cable and an 18-month warranty, providing confidence in your purchase.

The main limitation is the single USB-C port, which prevents simultaneous charging of the power bank and your device. Additionally, there is no LED display to show remaining battery capacity, so you will need to rely on your connected device's battery indicator or guess based on usage. These trade-offs are reasonable sacrifices for the slim profile, but they are worth considering based on your needs.

The Anker PowerCore Slim 10000 is an excellent choice for anyone seeking a genuinely portable charger that doesn't compromise on capacity or build quality. It strikes an ideal balance between power and portability, making it a standout option in the mid-range portable charger market.

Capacity: 10,000mAh

Dimensions: 5.99 x 2.81 x 0.61 inches

Weight: 8.6 ounces

Ports: USB-C (two-way input and output)

Charging Speed: Supports PowerIQ technology for optimized charging

Device Compatibility: iPhone 15 (approximately 2 charges), Samsung Galaxy S23 (approximately 1.93 charges), iPad mini 6 (approximately 1.23 charges), and other USB-C devices

Durability: Drop-tested at 3.2 feet, scratch-resistant design

Warranty: 18 months

Included Accessories: USB-C to USB-C cable, welcome guide, customer service support

The Miady 2-Pack 10000mAh Portable Charger is a practical solution for anyone who needs reliable backup power without sacrificing portability. Each unit packs 10000mAh of capacity into a remarkably thin profile, making these power banks genuinely pocket-sized despite their power. This 2-pack format is particularly smart for families, roommates, or anyone who wants to maintain one charger at home while keeping another for travel.

The standout feature is the triple output configuration: two USB-A ports and one USB-C port per unit allow you to charge three devices simultaneously. The 5V 2.4A maximum output distributes power intelligently across connected devices, so you can top up a phone, tablet, and smartwatch all at once without negotiating whose device gets priority. The USB-C port functions as both input and output, meaning you can recharge the power bank itself using the same modern connector found on many contemporary devices. Micro USB input provides a backup recharge method for added flexibility.

Build quality emphasizes safety and durability. The Li-polymer battery technology used here is inherently safer and lighter than conventional Li-ion cells, which translates to a charger you can confidently carry on airplanes or in tight spaces. At just 7.68 ounces per unit, these chargers won't weigh down your bag or create bulk in your pocket. The compact 5.5 x 2.6 x 0.6 inch dimensions feel genuinely slim in hand, a rarity among power banks with this capacity.

One consideration: the included USB-C cables are helpful, but iPhone users will need a separate Lightning cable since one is not provided. Additionally, the approximately 5-hour recharge time is moderate rather than fast, so plan ahead if you need to top up quickly. The 10000mAh capacity, while solid for emergency use, may require a recharge if you're powering multiple devices for an extended period.

This is an excellent choice for budget-conscious buyers, travel enthusiasts, and anyone who values portability over premium features. The two-unit package makes it easy to share or maintain backup power in multiple locations, and the multi-port design eliminates the frustration of choosing which device to charge first.

The YILANS 50000mAh portable charger is a comprehensive charging solution designed for users who need to power multiple devices simultaneously. Whether you are a frequent traveler, parent managing multiple devices, or someone who works with various gadgets daily, this power bank addresses the common frustration of having too many cables and not enough charging ports.

The standout feature is the combination of six output ports and built-in cables. Rather than juggling separate chargers for iPhone, Android, USB-C devices, and older Micro-USB accessories, you have everything integrated into one device. The 22.5W fast charging capability delivers meaningful speed improvements, particularly for newer iPhones and Android flagships. The real-time LED display removes guesswork about remaining capacity, which is helpful when planning your day or trip.

Build quality appears solid with intelligent safety monitoring that watches for overcharge, overvoltage, and short-circuit conditions. The 50000mAh capacity is genuinely substantial, capable of delivering multiple full charges to a standard smartphone. At 503 grams, it is noticeably heavier than compact single-port alternatives, but the trade-off is justified if you regularly charge multiple devices.

The main considerations are the premium positioning relative to basic power banks and the potential wear on built-in cables with extended use. Built-in cables offer convenience but lack the replaceability of external options. The device is also quite feature-rich, which means you are paying for simultaneous multi-device charging capability, whether or not you use all six ports regularly.

This power bank excels for families, business travelers, camping trips, and anyone managing multiple devices. It is less ideal if you only charge one device at a time or prioritize absolute minimalism and weight savings. Overall, it represents a practical investment in reducing charging friction for multi-device households.