Advertising Disclosure Ultra Slim Power Banks Comparison - July 2025
6 Best Ultra Slim Power Banks In the UK
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. By purchasing the products we rank, you’ll get the lowest price we found while we may receive a commission at no cost to you, which will help us continue to provide you with value.
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| 1 Best Choice  9.9Exceptional | 2  9.7Exceptional | 3  9.6Exceptional | 4 Best Value  9.3Excellent | 5  9.2Excellent | 6  9.1Excellent |
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ModelINIU Magnetic Power Bank, Qi2 Certified 45W 10000mAh Ultra Slim Wireless Portable Charger & Durable Battery Pack with Foldable Stand, Fast USB C Charging for Travel, Only for iPhone 16/15/14/13 Series | Model Anker MagGo Power Bank, Ultra-Slim 10,000mAh Magnetic Portable Charger, Qi2 Certified 15W Ultra-Fast MagSafe-Compatible Battery Pack, Ergonomic Design, For iPhone 15/14/13/12 Series Only | Model Auskang 5000mAh Power Bank with built-in Type-C Cable, Ultra Slim and Super Lightweight Portable Charger Small External Battery, Compatible with Samsung, Xiaomi, Sony, iPhone 15 Series, etc.- Black | Model Charmast Power Bank Quick Charge 10400mAh USB C Power Bank Ultra Slim Portable Charger LED Display Power Pack Compatible with Smartphone iPhone Huawei and More | Model Kuulaa Power Bank Ultra Slim, MagSafe PowerBank 5000 mAh 6.9 mm, PD20W Small Power Bank, Magnetic Wireless External Mobile Phone Batteries for iPhone 16 Pro/15/14/13/12 Series, Strong Protective Glass | Model Auskang Slim Power Bank with Built-in Cable 2500mAh, [USB C version] The Most Lightweight Battery Bank and Thinnest Portable Phone Charger - Credit Card Size |
BrandINIU | Brand Anker | Brand Auskang | Brand Charmast | Brand Kuulaa | Brand Auskang |
Reviews | Reviews | Reviews | Reviews  | Reviews | Reviews |
Tech Specs | |||||
product dimensions10.5 x 7 x 1.38 cm 230 g | product dimensions 10.39 x 7.06 x 1.5 cm 199.58 g | product dimensions 12.4 x 6.6 x 0.6 cm 115 g | product dimensions 14.4 x 6.7 x 1.5 cm 228 g | product dimensions 14.2 x 1.8 x 10.2 cm 140 g | product dimensions 9.3 x 6.4 x 0.45 cm 71 g |
batteries1 Lithium Polymer batteries required. included | batteries 1 Lithium Polymer batteries required. included | batteries 1 Lithium Polymer batteries required. | batteries 1 Lithium Polymer batteries required. included | batteries 1 Lithium Polymer batteries required. included | batteries 1 Lithium Polymer batteries required. included |
Available On | Available On | Available On | Available On | Available On | Available On |
Our Top 3 Picks
Here are the top 3 recommended products with more information to help you find the right product for you
9.9
1INIU23% OffINIU Magnetic Power Bank, Qi2 Certified 45W 10000mAh Ultra Slim Wireless Portable Charger & Durable Battery Pack with Foldable Stand, Fast USB C Charging for Travel, Only for iPhone 16/15/14/13 Series
Why we love it
Ultra-slim design fits in pocket.
Rapid wireless and wired charging.
High capacity for multiple charges.
Main highlights- What You Get: INIU 10,000mAh magnetic power bank*1, 12cm lanyard USB-C cable*1, user manual*1, and INIU industry-leading 3-year care and lifetime technical support.
- Ultra-Fast PD 45W Wired Charging: With the handy lanyard USB-C cable, charges your iPhone 16 to 50% in just 27min — no more long waits for a quick power-up.
- Market's Slimmest 10K Magnetic Power Bank: INIU's exclusive TinyCell technology enables an ultra-slim 1.4cm 10,000mAh power bank — perfectly fitting into your pocket for seamless portability without the bulk.
- Latest Qi2-Certified 15W Wireless Charging: Solving the industry's slow wireless magnetic charging issue, this MagSafe-compatible portable charger powers your iPhone 16 from 20% to 57% in just 25min — 2X faster than other 7.5W MagSafe chargers.
- Hands-Free Viewing with Foldable Stand: Use the integrated stand to charge vertically for hands-free video calls or horizontally for movie watching, while also accessing StandBy mode with ease.
- From INIU — the SAFE Fast Charge Pro: Experience the safest charging with over 38 million global users. At INIU, we use only the highest-grade materials, so we do have the confidence to provide an industry-leading 3 years INIU care.
- 2X Extra Power: The airline-approved 10,000mAh capacity delivers 1.9 charges for your iPhone 16 — far outperforming other 5,000mAh batteries that barely charge once.
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9.7
2Anker13% Off
Anker MagGo Power Bank, Ultra-Slim 10,000mAh Magnetic Portable Charger, Qi2 Certified 15W Ultra-Fast MagSafe-Compatible Battery Pack, Ergonomic Design, For iPhone 15/14/13/12 Series Only
Why we love it
Ultra-slim design for easy portability.
Fast wireless charging for quick power-ups.
High capacity for multiple full charges.
Main highlights- What You Get: Anker MagGo Power Bank (10K, Slim), 60 cm USB-C to USB-C cable, welcome guide, 24-month warranty, and our friendly customer service.
- Ultra-Slim Power: At just 104 × 70.6 × 14.7 mm thick, achieve maximum portability and power with our slimmest design to date. (Note: Based on internal comparisons with previous Anker models.)
- Ultra-Fast 15W Wireless Charging: Keep your devices fully charged wherever you go with 15W Qi2-certified wireless output, which charges an iPhone 15 Pro from 0 to 50% in 41 minutes. It also features a 30W USB-C port for extensive compatibility.
- Ergonomic Design, Enhanced Portability: Combines a matte UV finish and a sturdy metal frame for a superior user experience, enhanced by aerogel thermal insulation to keep it cool to the touch.
- 10,000mAh High-Capacity Power: Ideal for both daily use and travel, this power bank offers ample capacity, providing 1.8 full charges for an iPhone 15 Pro.
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9.6
3Auskang
Auskang 5000mAh Power Bank with built-in Type-C Cable, Ultra Slim and Super Lightweight Portable Charger Small External Battery, Compatible with Samsung, Xiaomi, Sony, iPhone 15 Series, etc.- Black
Why we love it
Built-in cable for easy charging.
Compact and lightweight design.
Simultaneous dual device charging.
Main highlights- [ Wide Compatibility and Dual Charging ]- Built-in Cable Output: 5V-2.1A; USB C Input: 5V-1.5A; USB C Output: 5V-2.1A. Compatible with almost all devices on the market. You can use the built-in cable to charge your devices and the power bank's USB-C port provides input and output functionality, allowing you to charge two devices simultaneously.
- [ High Capacity ]- With a high-quality 5000mAh battery, this slim power bank is perfect for outdoor emergencies during camping, vacations, or business trips. It also serves as a reliable power source for everyday use at home or in the office.
- [ Exquisite Packaging ]- The packaging is small and exquisite, which makes it a great choice as a gift. Power bank ultra-thin * 1 piece, Charging cable * 1 piece.
- [ Compact and Portable ]- Size: 12.4 * 6.6 * 0.68 cm and weighing only 130g, this small power bank is as portable as a credit card and as thin as 2-3 coins. Slip it into your pocket or handbag and take it with you wherever you go, ensuring you always have a power source at your fingertips.
- [ Built-in Cable ]- Experience the convenience of this small power bank that features a built-in cable for charging compatible Androids, Samsung, LG, Sony, and more. Say goodbye to the hassle of carrying extra charging cables.
Our ranking system
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Features
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Consumer Reviews
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Popularity
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Value for money
TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
Value for money
TopChoice.co.uk compares product attributes to price, examines tech specs, ratings and reviews, and more.When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.
