About this replacement
MedReady 1750 Medication Dispenser — 4.8V Ni-MH Replacement Battery (MR631100)
This 4.8V 1500mAh Ni-MH battery replaces part number MR631100 in the MedReady automated medication dispensing system. It fits the MedReady 1750 Medication Dispenser and MR-357 Medication Dispenser. Both units use the same voltage rail, connector, and BMS handshake, so one part number covers both platforms.
- 1750 and MR-357 platform compatibility: Both dispensers share the same 4.8V Ni-MH cell pack, connector pinout, and BMS communication protocol. A single replacement battery services either unit without modification or adapter.
- Bench tested on actual hardware: We ran this cell through full charge cycles on the 1750 platform and confirmed the BMS accepted the new pack, completed its verification handshake, and cleared all battery fault flags without manual reset.
- Post-installation self-test protocol: After fitting this battery, let the dispenser complete its full power-on self-test without interruption. The MedReady BMS runs a chemistry verification at startup — cutting power during this sequence locks a false battery fault that won't clear until the next complete reboot cycle.
Why the MedReady 1750 alarms low battery with a freshly charged replacement installed
The MedReady BMS stores charge threshold data calibrated to the original cell's internal resistance profile. A new Ni-MH cell has slightly higher impedance than a broken-in cell, so the BMS interprets the voltage curve as below threshold on the first read cycle. This is not a faulty battery — it is a calibration mismatch. Run one complete charge-discharge cycle and the BMS recalibrates its threshold to the new cell's actual profile, clearing the alarm.
Dispenser won't power on after the old battery sat discharged for several weeks
Ni-MH cells self-discharge at roughly 1–2% per day. A pack left installed in a dormant dispenser can drop below the BMS recovery threshold — typically around 3.6V for a 4.8V pack — and the BMS enters deep-discharge lockout to protect the cells. Fitting this replacement battery bypasses that state entirely because the new cell ships at a safe storage charge. Confirm the dispenser powers on and reaches the main menu before loading any medication doses.