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White rectangular power bank with mirror finish and LCD display

BytePower K108 20000mAh power bank White

SKU CH-3ZFP-73Z4W MPN K108

20000mAh power bank with PD 20W fast charging, three outputs, LCD display and airline-approved capacity

  • Total capacity20,000 mAh
  • Compatible phone brandsSmartphone
  • Compatible phone modelsSmartphone
  • Voltage12 V AC
  • Output typeUSB Type C
  • InputUSB Type C
  • 20000mAh capacity delivers multiple full device charges
  • 120W PD20W fast charging cuts recharge time significantly
  • Three simultaneous outputs power phone tablet and earbuds together
  • Smart LCD shows exact remaining percentage at a glance
  • Compact 5.55 x 2.64 x 0.63 in fits airline carry-on rules

20000mAh Portable Power Bank

The BytePower K108 delivers 20000mAh capacity in a white PC+ABS shell measuring 5.55 in x 2.64 in x 0.63 in. It targets travellers and commuters who need multiple device charges between wall outlets. Airline-compliant capacity allows carry-on transport for extended trips.

Installation & Common Issues

Connect devices via the two USB-C outputs, one USB-A output or recharge the bank through the USB-C or Micro-USB inputs. The LCD percentage display removes guesswork about remaining power. Mirror-finish surfaces resist scratches but show fingerprints; wipe with a soft cloth to maintain appearance.

Interface & Practical Limits

USB-C ports support 5V3A, 9V2.2A and 12V1.65A output profiles while USB-A delivers 5V3A, 9V2A, 12V1.5A and 10V2.25A. Recharging the bank accepts 5V2A, 9V2A or 12V1.5A input. Total simultaneous draw across three ports is limited by the 120W rating; high-power laptops may charge slowly or not at all.

How it compares

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

Price $20.99
Cheaper than about 90% of the 1,307 comparable items (median $36.99).

Specifications

Product
Brand nameBytePower
Model nameK108
Total capacity20,000 mAh
Product type20,000 mAh
Product colorWhite
Ports & slots
Output typeUSB Type C
InputUSB Type C
Power
Voltage12 V AC
Size & build
Measurements5.55 in × 2.64 in × 0.63 in
Compatibility
Compatible phone brandsSmartphone
Compatible phone modelsSmartphone

Questions about this item

How do I know the K108 is charging my phone at full 120W speed?

The LCD display shows the remaining battery percentage in real time; when a device draws the maximum 12V1.65A from the Type-C port or 10V2.25A from USB1-2, the percentage drops accordingly, confirming high-rate delivery.

What cables come with the 20000mAh power bank and what must I supply?

The box contains the K108 unit only; you need to provide a USB-C to USB-C cable for the Type-C input/output ports and a USB-A to USB-C or USB-A to Lightning cable for the USB1-2 outputs.

Should I choose the white K108 or the black version for airline travel?

Both colours share the same 20000mAh capacity and 120W PD20W specification, so either meets airline carry-on limits; pick the colour you prefer.

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