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Pearl Black rectangular power bank with built-in cables visible on the side

GrnOas.E K51-26-F 10000mAh 22.5W Power Bank Pearl Black

SKU CH-7GA0-J4T75 MPN K51-26-F

A 10000 mAh lithium polymer power bank with built-in Lightning and USB-C cables, four outputs, two inputs and 22.5 W fast charging in a slim 5.9 × 2.7 × 0.75 in Pearl Black case

  • Total capacity10,000 mAh
  • Battery chemistryLithium polymer
  • Voltage5 V
  • Measurements5.9 in × 2.7 in × 0.75 in
  • Product type10,000 mAh
  • Product colorPearl Black
  • Charge four devices at once with two built-in cables and two extra ports
  • Reach 22.5W PD fast charging through USB-C and 18W via USB-A
  • Recharge the bank via USB-C or Micro inputs for flexible top-ups
  • Graphene temperature control cuts heat by 20% while preventing over-charge and short circuits
  • Slim 5.9 x 2.7 x 0.75 in design at 8.4 oz fits easily in a travel bag

What this power bank delivers

The GrnOas.E K51-26-F packs 10000 milliamp_hours of lithium_polymer capacity into a Pearl Black shell that measures 5.9 in x 2.7 in x 0.75 in and weighs 8.4 Oz. It is built for travellers and commuters who want one device that can charge a phone, tablet and accessories without carrying separate cables.

Heat, noise and power in daily use

The pack uses graphene temperature control treatment that cuts charging heat by 20 percent compared with similar units. A smart chip guards against over-charge, over-voltage, over-current and short circuit, so the bank stays cool and silent while delivering up to 22.5W through its built-in USB C cable or 20W through the USB C port.

How it fits your kit

Two integrated cables — one for iPhone at 12W and one USB C at 22.5W — plus a USB A port at 18W and a USB C port at 20W let you run four devices at once. Recharge the bank itself through either the USB C input or the micro input, and the airline-approved rating means it clears security without extra checks.

How it compares

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

Price $21.99
Cheaper than about 88% of the 1,307 comparable items (median $36.99).

Specifications

Product
Brand nameGrnOas.E
Model nameK51-26-F
Total capacity10,000 mAh
Product type10,000 mAh
Product colorPearl Black
Power
Battery chemistryLithium polymer
Voltage5 V
Size & build
Measurements5.9 in × 2.7 in × 0.75 in

Questions about this item

How do I start charging my phone with the built-in Lightning cable and what step do people forget?

Press the power button once after plugging in the built-in Lightning cable; the charge will not begin until the button is pressed.

What part of the K51-26-F will wear out first and need replacement?

The internal lithium-polymer cells lose capacity over hundreds of cycles; when run-time drops noticeably, replace the whole power bank.

Which output hits its power limit first when I fast-charge a phone continuously?

The built-in Lightning cable is capped at 12 W, so it reaches its maximum before the 20 W USB-C port or the 18 W USB-A port.

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