Toshiba Satellite P200 Replacement Battery PA3536U-1BRS 10.8V
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Toshiba Satellite P200 Replacement Battery PA3536U-1BRS 10.8V - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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
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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Toshiba Satellite P200 Replacement Battery PA3536U-1BRS 10.8V - is backordered and will ship as soon as it is back in stock.
Voltage
10.8V
Amp
4400mAh
Toshiba Satellite P200-1CB / X200-21W — 10.8V Li-ion Replacement Battery (PA3536U-1BRS)
This is a 10.8V, 4400mAh (47.52Wh) Li-ion replacement battery for the Toshiba Satellite P200-1CB and the wider Satellite P200 / P200D / X200 / P305 notebook series. It matches the OEM part numbers PA3536U-1BRS, PA3537U-1BRS, and PABAS100. If the original cell has degraded to the point where the laptop no longer holds a charge away from the AC adapter, this cell restores portable operation.
- Satellite P200 / X200 series fit: These models share the same 10.8V three-cell rail and the same PA3536U-1BRS connector and BMS handshake protocol. The battery management IC communicates battery state to the Toshiba Power Saver firmware, so the physical connector and the BMS data lines both have to match — and they do across this group.
- Bench tested on actual hardware: We ran this cell on a Satellite P200-series unit and confirmed the BMS completed a full charge cycle without tripping an over-voltage fault. The protection circuit responded correctly to load spikes from the CPU and GPU under sustained stress, cutting in at the expected threshold without dropping the system.
- Post-install calibration on Satellite P200: After fitting the new cell, run the laptop down to hibernate cutoff under normal load, then charge uninterrupted to 100% before using it again. This resets the BIOS battery learn cycle and clears the inaccurate health warning that typically appears in Toshiba Power Saver after every cell swap.
Why Toshiba BIOS reports poor battery health immediately after fitting a new cell
The Satellite P200 BIOS stores capacity and health data in EEPROM on the battery pack itself. When a new cell goes in, that EEPROM data does not match the BIOS's learned baseline for the old pack. The firmware interprets the mismatch as a degraded or unknown battery rather than a new one. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% forces the BIOS to re-learn the cell's actual capacity curve. After one or two of these cycles, the health indicator and charge percentage stabilise.
Satellite P200 shutting down at 15–25% charge shown on screen
This is a voltage cliff failure, not a capacity problem. Under full CPU and display load, the cell voltage drops faster than the fuel gauge IC can track, and the system hits the low-voltage shutdown threshold before the displayed percentage reaches zero. It happens most often when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. Run two full discharge-to-hibernate cycles with the screen at full brightness and the CPU under normal load. After calibration, the gauge and the actual cell voltage will align, and the shutdown will move to the correct low-battery point — typically around 10.8V per pack under load.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Toshiba
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
Toshiba Power Saver shows the new battery as "unknown" or 0% straight after fitting — is the cell faulty?
The cell is almost certainly fine. The Satellite P200 reads capacity and state-of-health data from EEPROM on the pack, and a brand-new cell's EEPROM data doesn't match the BIOS's stored baseline from the old battery. Run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. That triggers the BIOS battery learn cycle and writes a fresh baseline — the "unknown" status clears after that first complete cycle.
The charge percentage jumps around wildly for the first few days — 60% one minute, 40% the next. What's happening?
The fuel gauge IC inside the pack is still calibrating against the new cell's actual discharge curve. It inherited no reference data from the old cell, so its estimates are rough until it maps the new chemistry across a few real discharge and charge cycles. Run two or three full discharge-to-hibernate cycles under normal use — screen on, CPU active — and the readings will settle. No hardware fault, no action needed beyond those calibration cycles.
Windows shows this replacement cell as 47Wh but the Toshiba battery report lists a different rated capacity — which is correct?
These are two different figures and both can be accurate at the same time. The 47.52Wh figure in Windows comes from the EEPROM rated capacity field on the new cell. The Toshiba battery report may show a learned full-charge capacity, which is calculated from actual discharge data the BIOS has accumulated — and on a freshly installed cell with no cycles yet, that learned figure is unreliable. After three full discharge-charge cycles, the learned capacity figure will converge toward 47Wh. Check the battery report again at that point and compare the two values.
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