Toshiba Satellite L700D Replacement Battery 10.8V PA3817U-1BAS
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Toshiba Satellite L700D Replacement Battery 10.8V PA3817U-1BAS - 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
⚠️ 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.
Toshiba Satellite L700D Replacement Battery 10.8V PA3817U-1BAS - is backordered and will ship as soon as it is back in stock.
Voltage
10.8V
Amp
6600mAh
Toshiba Satellite L700D — 10.8V Li-ion Replacement Battery (PA3817U-1BAS)
This 10.8V, 6600mAh Li-ion battery replaces the original PA3817U-1BAS and PA3817U-1BRS cells in the Toshiba Satellite L700D and L700 series notebooks. It fits the L700-T10R, L700-T11B, and over 300 additional Satellite L700 variants. Capacity is 71.28Wh — matching the original spec from Toshiba's own build sheet.
- Satellite L700 series compatibility: Every model in this family runs the same 10.8V three-cell rail with the PA3817U connector pinout and BMS handshake. That shared electrical architecture is why one cell covers 300-plus variants — the BMS negotiation is identical across the board.
- Bench tested on actual hardware: We cycled this cell through charge, load, and BMS trip conditions on the L700 platform. The protection circuit held charge termination correctly at full voltage and the BMS handshake authenticated without error flags in Toshiba's power management layer.
- First-cycle calibration on the L700D: After fitting, run the laptop on battery until it hibernates at cutoff — do not interrupt. Then charge uninterrupted to 100%. This clears the BIOS battery learn cycle and resets the fuel gauge IC against the new cell's actual capacity curve.
Why the Satellite L700D reports poor battery health immediately after a cell swap
The L700D reads health data from EEPROM registers stored on the old cell's gas gauge IC. When a new cell goes in, those registers are blank or mismatched — so BIOS flags poor health before a single charge cycle runs. This is not a fault with the replacement cell. One complete discharge-to-hibernate followed by an uninterrupted full charge resets the learn cycle. After two to three cycles the reported health figure stabilises and the warning clears.
L700D shutting down at 20–30% charge shown on the gauge
This happens when the cell voltage drops below the BMS cutoff threshold under combined CPU and display load — even though the OS fuel gauge still shows charge remaining. The fuel gauge IC hasn't yet mapped the new cell's discharge curve, so it reads optimistically. The cell hits roughly 9.6V under load and the BMS cuts power before the gauge reaches zero. Run two full calibration cycles as above and the gauge IC will track the actual voltage cliff correctly.
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
My Satellite L700D shows the battery as "unknown" or 0% in Windows right after fitting the new cell — is it dead?
The fuel gauge IC on the new cell has no calibration data yet, so Windows reads the EEPROM as blank and reports 0% or unknown status. This is expected after every cell swap on the L700 series. Run the laptop on battery until it hibernates, then charge uninterrupted to 100%. After one full cycle the gauge IC maps the new cell and the reading corrects itself.
Windows is showing 48Wh for this battery but the spec says 71.28Wh — why is the Wh figure wrong in system info?
The Wh figure Windows displays is pulled from the EEPROM on the cell, which stores the rated value from the previous battery's chemistry data. The new cell's EEPROM reports its own design capacity, and until the fuel gauge IC runs a full calibration cycle it may display an intermediate or carry-over figure. After two complete discharge-charge cycles the reported Wh value aligns with the actual 71.28Wh capacity. No firmware update or BIOS change is needed — calibration cycles fix it.
The L700D cuts off at around 25% and won't run past that point even after a full charge — what's causing it?
Under full CPU and display load the cell voltage drops sharply at the bottom of its discharge curve — what's called a voltage cliff. The BMS trips at approximately 9.6V to protect the cell, cutting power before the OS gauge reaches zero. The fuel gauge IC hasn't yet learned where that cliff sits on the new cell, so the percentage shown at cutoff looks high. Run two full discharge-to-hibernate and uninterrupted-charge cycles and the IC recalibrates its cutoff prediction to match the actual voltage floor.
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