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Black rectangular power bank with built-in USB-C cable and LED display

INIU P512 20000mAh Power Bank Black 22.5W

SKU CH-R42X-J1HKH

A 20000 mAh lithium-polymer power bank with 22.5 W fast charging, USB-C input and output plus two USB-A ports, and an LED display

  • Total capacity20,000 mAh
  • Battery chemistryLithium polymer
  • Voltage12
  • Output typeUSB Type C * 2 + USB C *1
  • InputOutput: USB Type C * 2 + USB C *1
  • Measurements4.1 in × 2.8 in × 1.1 in
  • Charges phone to 75% in 30 minutes with 22.5W output
  • Charges iPad Pro to 34% in 30 minutes via 22.5W high-speed output
  • USB-C port supports both input and output for newer devices
  • Three ports charge up to three devices simultaneously
  • 20000mAh capacity fits in 4.1 x 2.8 x 1.1 inch pocket-sized design

20000 mAh portable charger

The INIU P512 is a pocket-sized power bank built for travellers and commuters who need multiple phone recharges away from a wall outlet. Its 20000 mAh lithium-polymer cell stores enough energy for roughly four full phone cycles using the industry 65 % conversion estimate. Three output ports let you top up a phone, tablet and accessory simultaneously.

22.5 W PD and QC fast charging

The single specification that decides fit is the 22.5 W maximum output with PD 3.0 and QC 4+ support. That rating delivers up to 75 % charge on a compatible phone in 30 minutes and up to 34 % on an iPad Pro in the same window. If your devices require higher wattage or a different fast-charge protocol this unit will not reach their peak speeds.

Smart temperature throttling under load

An 18-layer SmartProtect system monitors cell temperature continuously and reduces output once heat rises during sustained multi-device charging. Maximum power is delivered only while the connected device is at low state of charge; as the battery fills the bank tapers current to protect both its own cells and the device battery. Expect full recharge of the bank in 5.4 hours with a 20 W wall adapter or 6.6 hours with a 15 W adapter.

How it compares

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

Price $41.99
Pricier than about 61% of the 1,307 comparable items (median $36.99).

Specifications

Product
Brand nameINIU
Model nameP512
Part numberP512
Total capacity20,000 mAh
Product type20,000 mAh
Product colorBlack
Ports & slots
Output typeUSB Type C * 2 + USB C *1
InputOutput: USB Type C * 2 + USB C *1
Power
Battery chemistryLithium polymer
Voltage12
Size & build
Measurements4.1 in × 2.8 in × 1.1 in

Questions about this item

How much of the 20000mAh rating actually reaches my phone?

A fully charged unit delivers roughly 12000–14000mAh to devices; the rest is lost as heat and voltage conversion.

What does the 22.5W USB-C port support for input and output?

The single USB-C port handles both PD3.0 and QC4+ fast charging up to 22.5W in either direction.

Will the 4.1 by 2.8 by 1.1 inch case fit in a typical trousers pocket?

At those dimensions it sits comfortably in most front pockets and small bags.

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