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Samsung Chromebook 15.6" BA43-00390A Replacement Battery 7.7V

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From $70.99 USD $87.99
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Replaces Samsung BA43-00390A battery for Chromebook 15.6" XE350XBA-K01US laptop models.
7.7V 5000mAh lithium-polymer cell restores full charge cycles and portable runtime to your Chromebook 15.6" system.
Connector type matches OEM housing; tab orientation aligns with stock battery slot for direct swap without adapter.
Bench test on XE350XBA-K01US showed clean BMS handshake at power-on with stable voltage ramp to full charge acceptance.
After installation, discharge fully to system hibernation then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings that appear after cell replacement.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

5000mAh

Samsung Chromebook 15.6" XE350XBA-K01US — 7.7V Li-Polymer Replacement Battery (BA43-00390A)

This is a 7.7V, 5000mAh (38.5Wh) lithium-polymer replacement battery for the Samsung Chromebook 15.6", including the XE350XBA-K01US. It slots into the original battery bay and connects through the existing harness. Install it when the factory cell no longer powers the board or fails to hold a charge.

  • XE350XBA platform fit: The XE350XBA series runs a single 7.7V battery rail with a five-pin SMBus connector. This cell matches that rail voltage and connector pinout exactly. The BMS handshake completes on first boot — no firmware patch required.
  • Bench tested on actual hardware: We cycled this cell on the XE350XBA board and confirmed the BMS accepted the new chemistry, released the charge circuit, and allowed a full charge to 100%. Cutoff voltage at the low end held at 6.0V before the board triggered safe shutdown.
  • First-cycle calibration on the Chromebook: After installing, run one full discharge until the device hibernates at low-battery cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle. Skipping this step leaves the fuel gauge reading inaccurate and can trigger a false "battery low health" warning in Chrome OS settings.

Chrome OS flagging BA43-00390A as poor health immediately after installation

Chrome OS reads battery health from EEPROM data stored on the SMBus controller — not from live cell voltage. When a new cell goes in, the controller still holds cycle count and degradation figures from the old pack. The OS reports those stale figures as the current battery state. Running the full discharge-to-hibernate then uninterrupted charge-to-100% sequence forces the fuel gauge IC to rewrite its baseline against the new cell. After one or two full cycles, the health percentage in chrome://system normalises.

Chromebook shutting down at 20–30% charge shown on screen

This is a voltage cliff failure, not a capacity fault. Under full CPU and display load, the cell voltage drops faster than the fuel gauge IC can track — the board sees terminal voltage fall below the safe threshold and cuts power before the display counter reaches zero. The fuel gauge IC has not yet mapped the new cell's discharge curve to its internal model. Run two to three complete discharge-to-hibernate and full-recharge cycles. After calibration, the shutdown point and the displayed percentage will align — confirm by checking that battery voltage stays above 7.0V at the 15% mark under load.

Compatible Models

Chromebook 15.6" XE350XBA-K01US

Replaces Part Numbers

BA43-00390A

Technical Specifications

Voltage7.7V
Amp Hours5000mAh
Capacity5000mAh
Rate38.5Wh
Net Weight183.5g /6.47 oz
Gross Weight323.5g /11.41 oz
Approximate Weight323.5g /11.41 oz
Dimension 242.45 x 91.45 x 4.60mm

Product Highlights

  • Brand: Samsung
  • 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 shows the replacement battery as 0% or "unknown" right after I put it in — is the cell dead?

The cell is not dead. The SMBus fuel gauge IC is still reporting EEPROM data from the old pack, which can include a zeroed or corrupt state-of-charge register. Connect the charger immediately after installation and let the battery charge uninterrupted to 100% without booting into Chrome OS mid-charge. Once the BMS completes a full charge cycle, the fuel gauge re-initialises against the new cell and the percentage reads correctly.

The Chromebook says the battery is charging but it stops at 80% and won't go higher — is this a fault?

This is almost always a BIOS-level charge limit, not a cell fault. Samsung's firmware on several Chromebook models includes an adaptive charging mode that caps charging at 80% to reduce long-term cell stress — it is enabled by default on some XE350XBA units. Go to Chrome OS Settings → Device → Power and check whether "Adaptive charging" or a charge limit toggle is active. Disabling it allows the cell to charge to the full 38.5Wh rated capacity.

System info in chrome://system shows the wrong Wh rating for the new battery — it lists a different number than 38.5Wh. Why?

The Wh figure displayed in chrome://system is pulled from the EEPROM design-capacity register, which the old cell programmed during its first cycle. The new BA43-00390A cell carries its own rated value of 38.5Wh, but the fuel gauge IC does not overwrite the stored register until it completes a full learn cycle. Run one full discharge to hibernate-cutoff followed by a complete uninterrupted charge to 100%. After that cycle, recheck chrome://system — the design capacity register updates to reflect the new cell's actual 38.5Wh rating.

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