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Asus C423NA Chromebook Replacement Battery 7.7V 4850mAh

Up to 19% off
New arrival
From $64.99 USD $79.99
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Fits Asus Chromebook C423NA-DH02 and replaces OEM part numbers C21N1808, 0B200-03060000, and 0B200-03130000.
This 7.7V 4850mAh Li-Polymer cell delivers 37.35Wh to restore full-day portable use on your Chromebook.
Connector seats into the internal battery slot with standard keying; no adapter or modification required.
We bench-tested this cell through five full charge cycles; the BMS stabilized voltage under sustained CPU load by cycle three.
After installation, discharge fully to sleep mode then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears false health warnings from the old cell's EEPROM data.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

7.7V

Amp

4850mAh

Asus C423NA-DH02 — 7.7V Li-Polymer Replacement Battery (C21N1808)

This is a 7.7V, 4850mAh (37.35Wh) Li-Polymer battery for the Asus Chromebook C423NA-DH02 and related C423NA and C523NA variants. It replaces OEM part numbers C21N1808, 0B200-03060000, and 0B200-03130000. If the original cell no longer holds charge or the Chromebook dies quickly off the charger, this swap restores full portability.

  • C423NA and C523NA series fit: These models share the same two-cell Li-Polymer pack, 7.7V nominal rail, and connector pinout. The BMS handshake protocol is identical across the NA-series board revision, so the same cell works across DH02, BV0054, EB0049, and the 0021AN4200 SKUs without firmware conflict.
  • Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the C423NA platform. The BMS accepted the pack without fault flags, charge current stepped down correctly at 4.35V per cell, and the protection circuit triggered cleanly at low-voltage cutoff.
  • Post-install calibration cycle: After fitting this battery, drain the Chromebook completely until it shuts off on its own, then charge uninterrupted to 100% without using the device. This resets the fuel gauge IC against the new cell's actual capacity and clears the inaccurate battery health warning that appears in Chrome OS after every cell swap.

Chrome OS reporting battery health as poor immediately after swap

Chrome OS reads battery health data from EEPROM registers that still carry the old cell's wear metrics. A fresh cell installed into a board with aged EEPROM data will show degraded health even at 100% charge. Running one full discharge-to-shutdown followed by an uninterrupted charge to 100% forces the fuel gauge IC to rewrite its learned parameters against the new cell. After one or two complete cycles, the health status in the battery diagnostics page updates to reflect actual capacity.

Chromebook shuts down abruptly at 20–30% charge shown on screen

This happens when the fuel gauge IC was calibrated against the old, worn cell and has not yet mapped the voltage curve of the new one. Under combined CPU and display load, voltage drops faster than the uncalibrated gauge predicts, and the BMS cuts power before the displayed percentage reaches zero. It is not a fault with the replacement cell. Complete the calibration cycle described above — discharge fully to automatic shutdown, then charge to 100% — and the gauge will track the new cell's voltage curve accurately from around 4.30V down to the cutoff threshold.

Compatible Models

C423NA-DH02 C423NA-BV0054 C523NA-0021AN4200 Chromebook C423NA-EB0049 C423NA-EB0033 C523NA-A20007 Chromebook C423NA-EC0109 Chromebook C523NA-BR0067 C523NA-1A C423NA-BV0017 C523NA-EJ0052 Chromebook C423NA-DH02 C423NA-EB0063 C523NA-A20025 Chromebook C423NA-BV0047 Chromebook C523NA-EJ0054 Chromebook C523NA-A20026 C423NA-BV0028 C523NA-EJ0058 CHROMEBOOK C523NA-1A C423NA-BV0078 C523NA-A20057 Chromebook C423NA-BZ0045 C423NA-BZ0027 C523NA-BR0043 Chromebook C523NA-A20071 C423NA-1A C423NA-BV0051 C523NA-A20093 Chromebook C423NA-EB0048 C423NA-EB0050 C523NA-A20045 Chromebook C523NA-EJ0055 Chromebook C523NA-A20045 C423NA-EB0020 C423NA-BZ0004 C523NA-EJ0053 Chromebook C423NA-1A C423NA-EB0108 C523NA-A20033 Chromebook C423NA-BV0016 chromebook-c523na-a20117 C423NA-BV0044 C523NA-EJ0054 Chromebook C423NA-EB0020 C423NA-0031AN4200 C523NA-A20026 Chromebook C423NA-BZ0040 C423NA-BZ0038 C523NA-BR0067 Chromebook C523NA-EJ0130 C423NA-BV0001 C523NA-A20105 Chromebook C423NA-EB0030 C423NA-RH91T-CB C423NA-BZ0057 C523NA-BR0035 Chromebook C523NA-A20057 C423NA Chromebook C423NA Chromebook C523NA-DH02 CHROMEBOOK C523NA-IH24T C423 Chromebook C523NA C523NA C523

Replaces Part Numbers

C21N1808 0B200-03060000 0B200-03130000

Technical Specifications

Voltage7.7V
Amp Hours4850mAh
Capacity4850mAh
Rate37.35Wh
Net Weight152.5g /5.38 oz
Gross Weight292.5g /10.32 oz
Approximate Weight292.5g /10.32 oz
Dimension 224.90 x 107.30 x 4.60mm

Product Highlights

  • Brand: Asus
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

Chrome OS says my new battery is at 0% or shows "unknown" right after I installed it — what's wrong?

The fuel gauge IC is still reading EEPROM data written by the old cell and has not yet mapped the new one. It has nothing to do with the replacement cell being faulty. Charge the Chromebook straight to 100% without interruption, then let it discharge completely until it shuts off on its own. One full cycle is usually enough for the gauge to register a valid state of charge.

My Chromebook's battery percentage jumps around wildly for the first few days — is the cell defective?

It is not defective. The fuel gauge IC needs two to three full discharge and charge cycles to build an accurate model of the new cell's capacity and voltage curve. Until those calibration cycles complete, the reported percentage can skip or stall by 10–15 percentage points under changing load. Run two uninterrupted full cycles — discharge to automatic shutdown, charge to 100% — and the readings stabilise.

System info shows the wrong Wh rating after I swapped the battery — it doesn't match what I ordered

Chrome OS pulls the Wh figure from the EEPROM embedded in the battery pack, which stores the rated value at manufacture. The actual chemistry capacity can differ slightly from the EEPROM-declared figure depending on cell batch. The 37.35Wh value from the product data is the measured capacity; if the system reports a slightly different number, that is an EEPROM declaration difference, not a wrong battery. Confirm voltage reads 7.7V nominal in the battery diagnostics page — if it does, the correct cell is installed.

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