Magellan K32RF Remote Compatible Battery 3.7V 1200mAh

Magellan K32RF / PAR-120 — 3.7V Li-ion Replacement Battery (DEM-1274)

This is a 3.7V 1200mAh Li-ion cell for the Magellan K32RF and PAR-120 wireless security system remote transmitters. It replaces OEM part numbers DEM-1274 and DEM-1280. When the original cell degrades, the remote loses the ability to arm or disarm the Magellan system reliably — this cell restores that function.

• K32RF and PAR-120 compatibility: Both remotes share the same 3.7V single-cell Li-ion architecture, the same physical footprint (53.00 × 33.90 × 5.70mm), and the same OEM connector and BMS handshake — which is why one cell covers both platforms.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a PAR-120 transmitter. The BMS accepted the cell without fault flags, and the remote re-paired with the panel without clearing existing zone programming.
• Float charge before first activation: After fitting this cell, place the remote on charge for a full cycle before arming or disarming. The panel receiver reads signal strength against battery voltage — a partially charged new cell can cause the panel to log a low-battery event on first use, even though the cell is fine.

Why the Magellan panel reports low battery 24 hours after a new cell is fitted

The Magellan panel polls the remote transmitter for a voltage status signal on a timed cycle. A new Li-ion cell ships at a storage charge — typically around 3.5V — not at full float voltage (4.2V). If the panel polls within the first charge cycle, it sees sub-threshold voltage and logs a low-battery event. This is not a faulty cell. Allow the remote to complete a full charge to 4.2V before the panel runs its next poll, and the fault clears automatically.

Remote transmits but panel does not respond after cell swap

This usually means the remote lost its pairing state when power was interrupted during the cell swap. The K32RF and PAR-120 store pairing data in volatile memory, which can reset if the old cell was fully depleted before removal. Re-enter the panel's receiver programming menu and re-enrol the remote using the original user code. Once the panel confirms enrolment, test arm and disarm — the remote should respond within one transmission cycle.