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Rectangular lithium-polymer laptop battery, dark casing, connector on one end

NShi

NShi 38Wh 7.7V C21N1808 laptop battery

SKU CH-B8S9-HJGTN

A 38 Wh lithium-polymer replacement battery rated at 7.7 V for select Asus Chromebook C423 and C523 models

  • Battery TypeLithium Polymer
  • Up to 500 recharge cycles for long service life
  • 38 Wh capacity at 7.7 V for compatible runtime
  • Lithium-polymer chemistry for stable power delivery
  • Replaces part numbers C21N1808, C21PqCH, 0B200-03060000, 0B200-03130000
  • Fits Asus Chromebook C423NA and C523NA series models

Replacement Battery for Asus Chromebook C423

This 38Wh lithium-polymer battery replaces the C21N1808 pack used in Asus Chromebook C423NA and C523NA series devices. It restores mobile power for students and professionals who rely on these models for daily work. Buyers needing a different voltage or form factor should look elsewhere.

Thermals Noise and Power Draw

The pack operates at 7.7V with a 4940mAh capacity and is rated for up to 500 recharge cycles over its life. Normal use stays within the thermal envelope designed for the original chassis. No active cooling or extra power circuitry is required beyond the laptop's own charging system.

Build Fit and Constraints

Two distinct C21N1808 variants exist and they are not interchangeable; verify the exact part number on your original battery before ordering. Compatible part numbers include 0B200-03060000 and 0B200-03130000. Installation uses the existing battery bay and connector without adapters.

Highlights

  • Up to 500 recharge cycles for long service life
  • 38 Wh capacity at 7.7 V for compatible runtime
  • Lithium-polymer chemistry for stable power delivery
  • Replaces part numbers C21N1808, C21PqCH, 0B200-03060000, 0B200-03130000
  • Fits Asus Chromebook C423NA and C523NA series models

Specifications

Battery TypeLithium Polymer

Questions about this item

How do I install the C21N1808 battery in my Asus Chromebook C423NA and what step do people often miss?

Power off the Chromebook, remove the bottom case screws, disconnect the old battery connector, fit the new 38Wh 7.7V pack, reconnect the cable securely, then reassemble; the step most often missed is fully seating the connector before closing the case.

What maintenance or replacement will the NShi 38Wh Li-polymer battery need later?

The battery is rated for up to 500 recharge cycles over its life; after that capacity drops noticeably and a replacement will be required.

What limit appears first during sustained use of this 4940mAh 7.7V battery?

The 38Wh capacity determines runtime; under continuous load the charge depletes before thermal or cycle limits become the bottleneck.

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