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Slim black rectangular power bank with USB-C and USB-A ports

Zmi

Zmi QB810 10000 mAh power bank

SKU CH-DT74-69C5X MPN QB810

A 10000 mAh lithium-polymer power bank with USB-C input and output delivering 3 A fast charging in a 0.5-inch slim profile

  • Total capacity10,000 mAh
  • Product typePower Bank
  • Product colorBlack
  • Key featuresBattery Type: Lithium-polymer cell Cell Capacity: 10,000 mAh
  • 10000 mAh capacity charges iPhone 8 up to 3.6 times
  • 5 inch slim profile slips into pockets or bags
  • USB-C input and output port works with your existing cables
  • 3 A fast charging reaches 78% on iPhone in one hour
  • 15-layer SmartProtect system prevents overheating and battery damage

Pocketable 10000 mAh power bank

The Zmi QB810 is a slim 10000 mAh lithium-polymer power bank measuring 0.5 inch thick. It targets travellers and daily commuters who need a full day of extra capacity for phones, earbuds or small tablets. The pack delivers 38.5 Wh of energy and includes a USB-A to USB-C cable plus a travel pouch.

USB-C in and out with 3 A output limit

Only 5 % of power banks offer USB-C for both input and output; this model does, alongside a Micro-USB input and a USB-A output. Maximum output is 5 V at 3 A, so devices that require higher voltages such as 9 V or 12 V will not fast-charge here. Recharging the bank itself accepts 5 V/2 A or 9 V/2 A via either input port.

Check your device charges at 5 V 3 A

Before ordering, verify that your phone, earbuds or tablet can accept 5 V at up to 3 A over USB-A or USB-C. Devices needing Power Delivery at 9 V or above will fall back to standard speeds. The bank operates between 0 °C and 45 °C, so avoid leaving it in hot cars or freezing conditions.

How it compares

Measured against everything we stock in Portable Chargers & Battery Packs, at today’s prices. Recalculated every night.

Price $47.99
Pricier than about 73% of the 1,307 comparable items (median $36.99).

Specifications

Product
Brand nameZMI
Model nameQB810
Total capacity10,000 mAh
Product typePower Bank
Product colorBlack

Questions about this item

Should I pick the 10000 mAh version or a larger capacity for multi-day travel?

The 10000 mAh cell stores 38.5 Wh and can top up an iPhone 8 about 3.6 times, a Samsung S22 roughly 1.7 times or AirPods Pro up to 13.2 times, making it a pocketable choice for one to two days of typical phone use.

What does the 3 A output actually deliver when I plug in my phone?

The USB-A port supports QC 2.0 at 5 V/2 A or 9 V/2 A and the USB-C port handles 5 V/3 A input and output, so a compatible phone can reach up to 78 % charge in one hour while the AutoFit feature matches the device's ideal speed.

Does the USB-C port work for both recharging the bank and charging my devices?

Yes, the USB-C port is dual-role — it accepts 5 V/3 A input to refill the bank and delivers 5 V/3 A output to charge phones, tablets or accessories with a single USB-C cable.

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