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Asus Chromebook C202 Replacement Battery C21N1530 7.6V 4900mAh

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From $85.99 USD $105.99
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Fits Asus Chromebook C202, C202SA, and C202SA variants using OEM part C21N1530.
7.6V 4900mAh lithium-polymer cell delivers 37.24Wh for full-day classroom and office use.
Connector orientation matches original housing; locking tab seats flush without force or shimming required.
We ran the pack through full discharge and recharge cycles; BMS accepted the handshake without delay.
After installation, run one complete discharge to hibernation cutoff then charge uninterrupted to 100% to reset the BIOS battery learn cycle and clear inaccurate health warnings.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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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.

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⚠️ 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

7.6V

Amp

4900mAh

Asus Chromebook C202 Series — 7.6V Li-Polymer Replacement Battery (C21N1530)

This is a 7.6V, 4900mAh (37.24Wh) Li-Polymer replacement battery for the Asus Chromebook C202 and C202SA series. It fits the OEM connector and sits within the same footprint as the original cell at 229.75 x 163.05 x 7.04mm. If the Chromebook no longer holds a charge or shuts down early, this cell replaces the degraded original.

  • C202 and C202SA compatibility: The C202 and C202SA share the same battery bay, BMS handshake, and connector layout. The C21N1530 part number covers both variants, including the C202SA-2A and C202SA-YS01. The voltage rail and cell configuration are identical across the range.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on a C202SA unit. The BMS accepted the cell without error, charge current ramped normally through CC/CV stages, and the protection circuit tripped at the correct low-voltage cutoff threshold.
  • Post-install calibration on ChromeOS: After fitting, run the battery down to auto-shutdown via hibernation, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning ChromeOS displays after a cell swap.

ChromeOS reporting battery health as poor immediately after swap

ChromeOS reads battery health data from EEPROM on the battery controller, not from live cell measurements. When a new cell goes in, the OS compares the fresh EEPROM profile against charge history it already logged for the old cell. That mismatch triggers a false "poor health" or "replace soon" warning. Running one full discharge-to-cutoff cycle followed by an uninterrupted charge to 100% forces the firmware to rewrite the learn cycle data against the new cell's actual capacity.

Chromebook C202 shutting down at 20–30% battery shown on screen

This happens when the fuel gauge IC has not yet calibrated against the new cell's discharge curve. The old cell's curve is still stored, so the gauge misjudges how much voltage remains under CPU and display load. When the new cell hits its actual voltage floor under load, the system cuts out even though the screen shows charge remaining. Discharge the battery fully to hibernate-cutoff at least twice, charging to 100% each time, and the gauge re-maps the curve to the new cell — shutdowns below 20% should stop after two to three calibration cycles.

Compatible Models

Chromebook C202 Chromebook C202SA Chromebook C202SA-2A Chromebook C202SA-YS01 E201NA-1B VivoBook E201NA-GJ022T VivoBook E201NA-GJ006T C202SA-GJ0024 VivoBook E201NA-GJ009T E201NA-GJ006T Chromebook C202SA-GJ0026 C202SA-GJ0027 E201NA-GJ022T Chromebook C202SA-GJ0056 C202SA-GJ0050 VivoBook E201NA Chromebook C202SA-GJ0031 C202SA-RB02-C E201NA-1D VivoBook E201NA-GJ023T E201NA-GJ005T VivoBook E201NA-GJ008T C202SA-GJ0025 VivoBook E201NA-GJ005T E201NA-GJ008T Chromebook C202SA-GJ0062 C202SA-GJ0033 C202SA-3A E201NA-GJ023T Chromebook C202SA-GJ0016 C202SA-GJ0066 C202SA-YS04 Chromebook C202SA-YS02 C202SA-2A Chromebook C202SA-GJ0048 C202SA

Replaces Part Numbers

C21N1530 0B200-01990000 0B200-02670000

Technical Specifications

Voltage7.6V
Amp Hours4900mAh
Capacity4900mAh
Rate37.24Wh
Net Weight192.2g /6.78 oz
Gross Weight452.2g /15.95 oz
Approximate Weight452.2g /15.95 oz
Dimension 229.75 x 163.05 x 7.04mm

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

ChromeOS shows "battery health: poor" right after I put in a new cell — is the replacement faulty?

It is not a fault with the new cell. ChromeOS pulls health data from EEPROM on the battery controller and compares it against charge history logged for the old cell — a new cell always triggers a mismatch warning. Run the battery down to auto-shutdown via hibernate, then charge uninterrupted to 100%. That resets the BIOS battery learn cycle and clears the warning.

The battery percentage jumps around wildly for the first few charges — skips from 60% to 30% then back up.

The fuel gauge IC on the C202 board is still running the discharge curve it mapped for the old degraded cell. Against a new cell with a different actual voltage profile, the readings are unreliable until the IC recalibrates. Run two to three full discharge-to-hibernate cycles with uninterrupted charges to 100% each time. After that, the gauge re-maps its curve to the new cell and percentage readings stabilise.

The replacement battery is only charging to 80% and stops — ChromeOS shows the charge bar stuck there.

This is a BIOS-controlled charge limit, not a cell fault. Asus and ChromeOS firmware on some C202 units include a battery longevity setting that caps charging at 80%. Open ChromeOS Settings, search for "Battery Saver" or check the battery section under Device, and disable the charge limit. If no toggle appears, check whether a managed school or enterprise policy has locked the charge cap — that requires an admin to remove it.

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