About this replacement
Mindray Telemetry Launcher / TMS60 / TM80 — 3.8V Li-ion Replacement Battery (LI21I001B)
This 3.8V, 3800mAh Li-ion battery replaces the OEM cell in the Mindray Telemetry Launcher, TMS60, TM80, and TMS-6016 wireless patient monitoring transmitters. These units send continuous vital sign data from patients to central nursing station monitors. The OEM part numbers this cell covers are LI21I001B and 022-000196-00.
- TMS60, TM80, and TMS-6016 compatibility: These transmitters share the same 3.8V power rail, physical form factor, and BMS handshake protocol — one cell fits across all variants without modification to the battery bay or firmware configuration.
- Bench tested on actual hardware: We ran this cell through charge-discharge cycles on the TMS60 platform. The BMS accepted the new cell on first insertion, passed voltage verification, and held communication with the transmitter's charge circuit without triggering fault codes.
- Post-swap self-test procedure: After installing this battery, allow the Telemetry Launcher to complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power during this window causes a false battery fault flag that persists until the next full reboot cycle.
Why the Telemetry Launcher flags a battery fault on first boot after a swap
Mindray telemetry transmitters run a BMS handshake at startup that checks cell voltage against an OEM-calibrated threshold. A new cell arriving at partial charge from storage may read below that threshold, triggering a fault flag even though the cell is functional. This is not a defective battery — it is the device applying a conservative check tuned to a fully conditioned OEM cell. One complete charge cycle from the wall charger brings the cell into the accepted voltage window and clears the flag on next boot.
Charge indicator not reaching 100% on the first charge
On the first charge of a replacement cell, the Telemetry Launcher's charge IC applies a conservative current limit while it profiles the new battery's internal resistance. This causes the charge indicator to plateau below 100% and hold there longer than expected. The device is not faulty — this behaviour resolves after the first full charge-discharge cycle as the charge IC updates its cell model. After that initial cycle, subsequent charges reach full capacity and the indicator behaves normally.