About this replacement
Edan oximeter H100 Series — 4.8V Ni-MH Replacement Battery (M159105)
This is a 4.8V, 1500mAh Ni-MH battery for the Edan oximeter H100, H100N, H100B, and CS-01 pulse oximeters. These handheld medical devices measure blood oxygen saturation and pulse rate non-invasively at the bedside or in the field. Voltage and cell count match the OEM specification exactly.
- H100 series compatibility: The H100, H100N, and H100B all run the same 4.8V power rail with an identical connector footprint and BMS handshake profile. The CS-01 shares the same cell configuration. One battery services all variants in this family.
- Bench tested on actual hardware: We cycled this cell through the H100 charge-discharge sequence and confirmed the BMS accepted the new cell without fault codes. Charge termination triggered at the correct delta-V threshold on the first full cycle.
- Post-swap self-test requirement: After installation, allow the device to complete its full power-on self-test without interruption. The H100 runs BMS verification at every startup — cutting power during this sequence logs a false battery fault that will persist until the next complete reboot.
Device not completing boot sequence on a freshly installed battery
The H100's startup routine includes a BMS verification step that checks cell voltage against a stored threshold. A new Ni-MH cell that has self-discharged in storage can sit below 4.4V — just enough to start the boot but not enough to pass the verification check. The device halts mid-sequence and displays a battery fault. Connect the charger before powering on, allow the cell to reach at least 4.6V, then boot the device with the charger still attached.
Low battery alarm triggering immediately after a confirmed full charge
The H100 BMS calibrates its low-battery threshold against cell behaviour it has learned over previous cycles. On a brand-new cell, that learned profile does not yet exist, so the BMS applies a conservative floor and flags low battery even at adequate charge levels. This clears after one complete charge-discharge cycle run outside clinical use. Run the oximeter on the bench until it shuts down on low battery, recharge fully, and the alarm will stop triggering prematurely from that point forward.