We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black rectangular laptop battery with connector and buckles

BFKK

BFKK C21N1808 7.7V 38Wh laptop battery

SKU CH-RK1R-B5E1W MPN C21N1808

Replacement lithium-ion battery for Asus Chromebook C423NA and C523NA models, 7.7V 38Wh capacity with up to 1000 recharge cycles

  • 7 V 38 Wh capacity powers compatible Asus Chromebooks
  • 4940 mAh lithium-ion cell delivers extended runtime
  • Up to 1000 recharge cycles support long-term use
  • Replaces original part numbers C21N1808 C21PqCH 0B200-03060000 0B200-03130000
  • Fits multiple C423NA and C523NA series models

Replacement battery for Asus Chromebooks

This lithium-ion pack replaces the original C21N1808 cell in compatible Asus Chromebook C423NA and C523NA models. It delivers 7.7 volts and 38 watt-hours of capacity, matching the factory voltage and energy rating. The black casing fits the existing battery bay without modification.

Suitable for owners of listed C423NA

Buyers whose Chromebook carries one of the exact model numbers or part numbers shown in the compatibility list can use this pack as a direct swap. It is not for users of other Asus series, different brands, or machines that require a different voltage or connector layout.

7.7 V 38 Wh Li-ion cell with dual buckle options

The battery supplies 7.7 V and 38 Wh through a lithium-ion chemistry rated for over 1000 recharge cycles. Two buckle styles exist for this part number; confirm the original battery's latch shape before ordering to ensure a secure fit.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $50.99
Pricier than about 82% of the 27,790 comparable items (median $30.99).

Specifications

No published specifications for this item yet.

Questions about this item

How many full recharge cycles can the 38Wh Li-ion cell sustain before capacity drops?

The battery is rated for up to 1000 recharge cycles over its service life.

Does the pack generate noticeable heat or fan noise during continuous daily charging?

As a passive Li-ion module it produces no fan noise; warmth under load is normal for any laptop battery.

Which exact Asus Chromebook sub-models use the C21N1808 connector and dual-buckle layout?

It fits C423NA variants BV0001, BV0017, BV0044, BV0051, BV0054, BV0078, BZ0004, BZ0027, BZ0038, BZ0057, DH02 and C523NA variants A20007, A20025, A20026, A20033, A20045, A20057, A20093, A20105; verify your original battery has the matching buckles.

More in Laptop Chargers & Batteries

Similar items