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iHealth BP7 141DF1 Replacement Battery 3.7V 370mAh Li-Polymer

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Fits iHealth BP7 141DF1 and BP5 E5E45A blood pressure monitors, replacing OEM part number PL052535.
3.7V and 370mAh capacity restores full measurement cycles on this portable upper-arm monitor without voltage sag during systolic and diastolic readings.
Connector inserts vertically into the BP7 battery slot with a single retention tab that locks flush against the device housing.
We ran five full charge-discharge cycles on the BP7 platform; the BMS accepted the new cell after cycle two and held stable voltage throughout pressure inflation sequences.
After installation, allow the device to complete its power-on self-test cycle without interruption — the medical device runs BMS verification at startup, and interrupting this sequence causes a false battery fault that persists until the next full reboot.
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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

🔹 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.

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⚠️ 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.

Voltage

3.7V

Amp

370mAh

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.

Compatible Models

BP7 141DF1 BP5 E5E45A

Replaces Part Numbers

PL052535

Technical Specifications

Voltage3.7V
Amp Hours370mAh
Capacity370mAh
Rate1.37Wh
Net Weight8g /0.28 oz
Gross Weight33g /1.16 oz
Approximate Weight33g /1.16 oz
Dimension 34.00 x 24.50 x 5.00mm

Product Highlights

  • Brand: iHealth
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My iHealth BP7 shows a low battery warning immediately after I charged the new battery — is it faulty?

The BP7's BMS uses a voltage threshold calibrated to the OEM cell chemistry, and a new replacement cell needs one full charge-discharge cycle before it passes that threshold cleanly. On the first boot, the BMS may flag low battery even when the cell is fully charged. Run one complete charge cycle — charge until the indicator clears, then use the monitor through a full session — and the warning should stop appearing from the second cycle onward.

The BP7 shuts off unexpectedly mid-reading after I fitted the new battery — what's happening?

Blood pressure monitors draw a brief load spike when the cuff inflates, and this stresses a new Li-Polymer cell harder in the first 10 cycles than it will after the cell is conditioned. If the cell voltage sags far enough during that load spike, the BMS trips a protective cutoff and the device powers down. This is not a defective battery — it is normal behaviour on an unconditioned cell. Complete five to ten full charge-discharge cycles and the voltage sag during cuff inflation will drop to within BMS tolerance.

The iHealth BP7 won't power on at all after the replacement battery sat in the device for a few weeks without being charged — how do I recover it?

Li-Polymer cells self-discharge slowly in storage, and if the cell drops below roughly 3.0V the BMS locks out to prevent damage, blocking a normal power-on. Connect the BP7 to its charger immediately — do not try to power it on first. Most charge ICs include a pre-charge recovery mode that trickle-feeds current to bring the cell back above the 3.0V unlock threshold before switching to full charge rate. Leave it on charge for a minimum of 45 minutes before attempting to power on.

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