About this replacement
Sony PRS-950 / PRS-950SC — 3.7V Li-Polymer Replacement Battery (LIS1460HEPC)
This 3.7V, 1700mAh Li-Polymer cell replaces the original LIS1460HEPC battery in the Sony Reader PRS-950 and PRS-950SC e-readers. The thin 3.77mm profile fits the slim chassis without modification. Dimensions are 99.45 × 43.00 × 3.77mm — verify these against your existing cell before fitting.
- PRS-950 and PRS-950SC compatibility: Both models share the same battery bay dimensions, connector pinout, and Sony BMS handshake protocol. One cell covers both variants without any adapter or rewiring.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on a PRS-950 unit. The BMS accepted the cell immediately, balanced charge terminated cleanly at 4.2V, and the firmware reported state-of-charge without errors.
- Post-swap charge cycle on the PRS-950: After fitting this cell, connect the reader via USB and allow a full charge before use. The PRS-950 firmware recalibrates its battery percentage display against a complete charge cycle — skipping this step causes inaccurate gauge readings from the first use onward.
Why the PRS-950 shows low battery immediately after a new cell is fitted
Li-Polymer cells ship at storage voltage — typically 3.6V to 3.85V — not at full charge. The PRS-950 firmware reads this as a partially depleted battery rather than a new one. The percentage display will appear low or erratic until the cell reaches a full 4.2V charge. This is a firmware calibration behaviour, not a fault with the replacement cell.
PRS-950 not powering on after battery replacement
If the reader won't boot after the swap, the cell voltage is likely below the minimum boot threshold the device requires to start. Connect the PRS-950 to a USB charger and leave it for at least 10 minutes without pressing the power button. The charging circuit will raise the cell voltage above the boot floor. Once it powers on, allow a full charge cycle to complete before disconnecting — target a full 4.2V termination.