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Ultra-thin gold and black power bank the size of five credit cards with flip-out USB and Micro USB connectors

Linearflux

Linearflux LC121GDBK LithiumCard power bank 1200 mAh Gold/Black

SKU CH-5QPV-EYV39 MPN LC121GDBK

Ultra-thin 1200 mAh power bank fits in a wallet and charges Micro USB devices at 2.0 amps with a built-in cable and NanoStik pad

  • Total capacity1,200 mAh
  • Compatible phone brandsUniversal
  • Product typePower Bank
  • Product colorGold/Black
  • Key features2.0 A / 1,200 mAh Capacitiy Ultra-Thin: The equivelance of 5
  • Fits most wallets at just 0.22 inches thick
  • 0 amp output charges phones up to 1% per minute
  • Built-in Micro USB and flip-out USB eliminate extra cables
  • NanoStik pad keeps power bank attached to your device
  • Multi-colour meter shows charge level at a glance

Ultra-thin wallet power bank

The Linearflux LithiumCard LC121GDBK is a 1200 mAh power bank finished in Gold/Black. It measures 3.37 x 2.12 x .22 inches and weighs 1.59 oz, roughly the thickness of five credit cards. An integrated flip-out USB connector recharges the internal battery while a built-in Micro USB tip charges the device. A NanoStik pad keeps the unit attached to a phone during use.

For minimal daily top-ups

This suits anyone who wants a nearly invisible emergency charge that lives in a wallet or sticks to the back of a phone. The 2.0 A HyperFET circuitry delivers up to 1% per minute, so it is useful for quick boosts rather than full recharges. Buyers who need multiple phone charges or want to power tablets and laptops should look at higher-capacity packs. Users whose devices only accept USB-C or Lightning connectors cannot use the fixed Micro USB tip.

Check your charging port

Verify that the device you intend to charge has a Micro USB input; the built-in connector cannot be swapped. The flip-out USB plug requires a standard USB-A port or adapter to replenish the power bank itself. Confirm that a 1200 mAh capacity matches the emergency runtime you expect. The multi-colour meter shows white above 90%, blue between 10% and 90%, and red below 10%.

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 nameLinearflux
Product lineLithiumCard
Model nameLC121GDBK
Total capacity1,200 mAh
Product typePower Bank
Product colorGold/Black
Size & build
Shipping weight0.18 kg
Package size152 × 102 × 25 mm
Compatibility
Compatible phone brandsUniversal

Questions about this item

What cable do I need to recharge the LithiumCard itself?

The built-in flip-out USB connector plugs into any standard USB port or charger to refill the internal 1200 mAh battery.

Will the Micro USB output work with my older phone that only has a Micro USB port?

Yes, the integrated Micro USB connector is designed for universal compatibility with Micro USB devices.

How do I know the power bank is charging my phone at the advertised rate?

The multi-color meter shows white above 90%, blue between 10% and 90%, and red below 10% so you can see the charge level at a glance.

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