Critikon EPP-100C Dinamap Plus 12V Replacement Battery

Critikon Systems Dinamap Plus 8710/8720/8725 — 12V Ni-MH Replacement Battery (EPP-100C)

This is a 12V, 1800mAh Ni-MH replacement battery for the Critikon Systems Dinamap Plus 8710, 8720, and 8725 non-invasive blood pressure monitors. It carries OEM part number EPP-100C and slots into the same bay as the original cell. Voltage and capacity match the factory specification exactly.

• Dinamap Plus 8710, 8720, and 8725 compatibility: All three models share the same 12V battery bay, connector pinout, and charge management circuit. One cell fits all three units without modification or adapter.
• Bench tested on actual hardware: We cycled this cell through the Dinamap Plus charge and discharge sequence. The BMS accepted the cell on first insertion, held charge correctly, and the low-battery alert triggered at the expected voltage threshold.
• Clinical unit power-down handling: If the monitor will sit unused for more than two weeks — common between ward rotations — remove the battery from the bay. Ni-MH cells left at partial charge inside medical equipment can trigger false low-battery warnings after extended standby due to self-discharge characteristics of the chemistry.

Why the Dinamap Plus BMS rejects a new cell on first install

The Dinamap Plus charge circuit checks cell voltage on insertion before initiating a charge cycle. A new Ni-MH cell shipped in storage mode may sit below the monitor's minimum acceptance threshold — typically around 10V for a 12V Ni-MH pack. When this happens, the monitor either shows no battery indicator or fails to power on from battery alone. Connect the unit to mains power first and allow a full supervised charge cycle to complete. Once the cell reaches a voltage the BMS recognises, the monitor will operate normally on battery power.

Monitor shows battery present but drops to low-battery warning faster than expected

Ni-MH cells have a flatter discharge curve than Li-ion, and the Dinamap Plus indicator is calibrated to that curve. A new cell that hasn't completed its first full charge cycle will show a compressed voltage range, making the monitor's gauge read low earlier than the actual charge state warrants. Run two to three full charge-discharge cycles on mains power before relying on the battery indicator for clinical decisions. After conditioning, the low-battery threshold should align at approximately 10.8V under load.