About this replacement
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.