About this replacement
Boyue P6 — 3.7V Li-Polymer Replacement Battery (T-345769P)
This 3.7V, 1600mAh lithium-polymer cell replaces the original T-345769P battery in the Boyue P6 e-reader. It fits the P6's compact battery bay and connects to the same BMS interface as the factory cell. Capacity figure is taken directly from the product specification — 1600mAh / 5.92Wh.
- Boyue P6 fitment: The P6 uses a single-cell Li-Polymer pack at 3.7V nominal. The flat pouch format at 69.20 × 57.22 × 3.60mm matches the original cell cavity, and the connector pinout mirrors the factory BMS handshake so the e-reader firmware reads charge state normally.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the P6 platform. The BMS accepted the new cell without fault codes, and battery percentage reported correctly after a full charge cycle was completed from storage voltage.
- Post-swap charge cycle on the P6: After fitting this cell, connect via USB to a charger and run one complete charge cycle before use. The P6 firmware recalibrates its battery percentage display to the new cell during that first full charge — skipping it causes the indicator to read inaccurately for several sessions.
Why the P6 shows an incorrect battery percentage after a cell swap
E-reader firmware tracks charge state against a learned cell profile built up over many cycles. When a new cell goes in at storage voltage — typically around 3.6–3.7V — the firmware has no calibration data for it yet. The percentage display maps against the old profile, so it can show values like 60% on a fully charged cell or drop suddenly mid-session. One complete charge-to-full cycle rewrites the reference point and the display stabilises.
P6 not powering on after battery replacement
If the P6 shows nothing after a swap, the replacement cell has likely shipped at a voltage below the device's minimum boot threshold — typically under 3.4V. The unit will not attempt to power on below this level as a low-voltage protection measure in the BMS. Connect the P6 to a USB charger and leave it for 10 minutes without pressing the power button. Once the cell climbs above the boot threshold, the device will respond normally.