About this replacement
iHealth BP7 141DF1 / BP5 E5E45A — 3.7V Li-Polymer Replacement Battery (PL052535)
This is a 3.7V 370mAh Li-Polymer battery for the iHealth BP7 141DF1 and BP5 E5E45A portable upper-arm blood pressure monitors. It replaces part number PL052535 and restores full measurement capability when the original cell has degraded past usable capacity. Voltage, connector, and cell dimensions match the OEM specification at 34.00 × 24.50 × 5.00mm.
- BP7 and BP5 shared platform: Both models run the same 3.7V power rail, use the same PL052535 cell footprint, and share BMS handshake logic — which is why one part number covers both devices.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the BP7 platform and confirmed the BMS accepted it without triggering a false low-battery fault after the first full charge cycle.
- Post-swap power-on sequence: After fitting this battery, let the device complete its full power-on self-test without pressing any buttons — the BMS runs a verification step at startup, and interrupting it can lock in a false battery fault that persists until the next clean reboot.
Device not completing boot sequence after battery swap
The BP7 runs a BMS verification routine every time it powers on. If the new cell voltage sits below approximately 3.5V after storage, the monitor may stall mid-boot or display a battery error before the home screen loads. This is not a faulty battery — it is the BMS rejecting a cell that has self-discharged below its recovery threshold. Connect the device to its charger for at least 30 minutes before attempting a cold boot, then power on without interruption.
Charge indicator not reaching 100% on the first charge
On first charge, the BP7's charge IC applies a conservative current limit to a new Li-Polymer cell, which can cause the indicator to plateau at 90–95% and stall. This is the charge controller applying a trickle-top phase that takes longer on a fresh cell than on a conditioned one. Leave the device on charge for a full uninterrupted cycle until the indicator clears. After one complete charge-discharge cycle, subsequent charges will reach 100% and the indicator will behave normally.