Respironics BiliChek 1002738 Replacement Battery 3.7V 2600mAh

Respironics BiliChek Noninvasive Bilirubin Analyzer — 3.7V Li-ion Replacement Battery (1002738)

This 3.7V 2600mAh (9.62Wh) Li-ion cell replaces the OEM battery in the Respironics BiliChek Noninvasive Bilirubin Analyzer and BiliChek Noninvasive Bilirubin Assessment units. The BiliChek is a handheld transcutaneous bilirubin meter used in neonatal care for jaundice screening. Dimensions are 66.50 × 21.60 × 18.70mm — confirm against your existing cell before installing.

• BiliChek platform compatibility: The BiliChek Analyzer and BiliChek Assessment units share the same 3.7V cell architecture and connector pinout, which is why a single part number (1002738) covers both. Cross-reference OEM nos OM0047, 989805603471, B11813, and B12005 if your unit displays an alternate service code.
• Bench tested on actual hardware: We cycled this cell through the BiliChek's startup sequence and confirmed the BMS handshake completes without fault flags. Charge acceptance and cutoff voltages matched OEM specifications across multiple charge cycles.
• Post-swap self-test protocol: After installing this cell, let the device complete its full power-on self-test without interrupting or powering off mid-sequence. The BiliChek runs a BMS verification check at startup — cutting power during this window logs a false battery fault that persists until the next clean reboot cycle.

BiliChek alarming low battery immediately after a confirmed full charge

The BiliChek's charge IC applies a conservative threshold during the first charge cycle on a new cell. If the cell voltage hasn't settled above the BMS acceptance floor — typically around 3.6V resting — the device treats it as a low or failed pack. This is not a defective cell. Run one complete charge-discharge cycle and allow the resting voltage to stabilise before drawing any clinical conclusion about battery state. After that first full cycle, the charge indicator and low-battery alarm behave normally.

Device will not power on after the replacement cell sat in storage

Li-ion cells self-discharge during storage, and the BiliChek's BMS has a recovery threshold below which it refuses to initialise — typically under 3.0V. A cell that shipped or sat on a shelf for several months may arrive below that floor. Place the battery in the charger for a minimum of two hours before attempting to power on the device. If the device still does not boot, confirm charger output and check that cell voltage has recovered to at least 3.2V before retrying.