Linear Corp PERS-4200 Replacement Battery 7.2V 2000mAh Ni-MH

Linear Corp PERS-4200 — 7.2V Ni-MH Replacement Battery (6MR160AAY4Z)

This is a 7.2V, 2000mAh Ni-MH replacement battery for the Linear Corp PERS-4200 personal emergency response system. It powers the wireless pendant that connects to monitoring centers when the wearer presses the help button. Capacity figures come directly from product data — 14.4Wh total energy.

• PERS-4200 pendant compatibility: The PERS-4200 uses a sealed Ni-MH cell pack at 7.2V to maintain the RF link with the base station. OEM part numbers 6MR160AAY4Z, 10-000013-001, LIN-SSC00079, and GP220AAH6YMK all reference the same form factor and connector used in this pendant.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the PERS-4200 platform. The onboard BMS accepted the cell without fault codes, and the pendant re-established its base station link normally after the conditioning cycle completed.
• Float charge before first test activation: After installing this cell, leave the pendant on its charger cradle for 24–48 hours before pressing the help button or running a test call. The PERS-4200's charge circuit needs that window to bring the Ni-MH pack to full float — triggering a test call early can cause the unit to report low battery even with a fresh cell installed.

Why the PERS-4200 reports low battery immediately after a cell swap

The PERS-4200 reads battery status through the charge circuit, not a direct voltage tap at the terminal. A freshly installed Ni-MH cell sitting below full float voltage will trigger a low-battery status flag even though nothing is wrong with the cell. The charger cradle needs 24–48 hours to bring the pack above the threshold the firmware uses to clear that flag. Until that charge cycle completes, any supervisory signal sent to the monitoring center will carry a low-battery descriptor.

PERS-4200 pendant not transmitting after battery replacement

If the pendant powers on but fails to check in with the base station after a battery swap, the RF handshake sequence did not complete correctly. This usually happens when the cell voltage is still below 7.0V at the time of first power-on, which causes the transmitter circuit to abort the pairing sequence. Place the pendant back in the charging cradle and allow it to reach full charge before attempting re-registration. Once terminal voltage holds steady above 7.0V, remove and re-seat the pendant on the base — the handshake will restart automatically.