About this replacement
Edan X12 / F15 — 10.8V Li-ion Replacement Battery (01.21.064381)
This 10.8V 6700mAh Li-ion battery replaces the original power cell in the Edan X12 and F15 portable ECG monitors. It matches the OEM voltage rail and BMS communication protocol required by both devices. Capacity figure is drawn directly from product data — 72.36Wh.
- X12 and F15 platform compatibility: Both devices share the same 10.8V three-cell battery architecture, connector pinout, and BMS handshake sequence. The X12 and F15 pull from the same OEM battery line — part numbers 01.21.064381, 120010-O, and ID996 all cross-reference to this cell pack.
- Bench tested on actual hardware: We cycled this battery through a full charge-discharge sequence on the X12 platform. The BMS completed its verification handshake without fault codes, and the charge IC accepted the cell without triggering a chemistry mismatch alarm.
- Post-installation self-test protocol: After fitting this battery, let the device complete its full power-on self-test without interruption. The X12 and F15 run a BMS verification step at startup — cutting power during that sequence logs a false battery fault that persists until the next clean reboot.
Why the X12 or F15 won't complete its boot sequence on a new battery
The X12 boot sequence includes a BMS interrogation step that checks cell voltage against an internal threshold. A new battery that has partially self-discharged during storage can sit just below that threshold, causing the device to stall mid-boot or restart in a loop. This is not a faulty battery — it is the device's protective logic responding to a low resting voltage. Connect the device to mains power and allow a full charge cycle before attempting to boot on battery alone.
Charge indicator stalls below 100% on the first charge
The X12 charge IC applies a conservative upper current limit when it first encounters a new cell with no charge history. This causes the indicator to plateau — typically between 90% and 97% — and hold there for an extended period before the final top-off completes. Do not remove the battery or interrupt the charge. Let the cycle finish fully; subsequent charges will reach 100% at the expected rate. If the indicator never advances past 90% after two full charge attempts, check that the charger output is within the rated input voltage for the device.