Delta Dore Tyxal + DME Compatible Battery 3.6V 5400mAh

Delta Dore Tyxal + DME / DMBE — 3.6V Li-SOCl2 Replacement Battery (2280015)

This is a 3.6V, 5400mAh lithium thionyl chloride cell for the Delta Dore Tyxal + alarm system range. It fits the DME, DMBE, and Wilpa2493A control panels. The OEM part numbers are 2280015 and 6416227.

• Tyxal + DME, DMBE, and Wilpa2493A fitment: These panels share the same 3.6V power rail, identical cell footprint (51.60 × 29.30 × 14.50mm), and the same BMS charge-acceptance handshake — so one cell covers all three variants without modification.
• Bench tested on actual hardware: We ran this cell through the Tyxal + panel's initialisation cycle and confirmed the BMS accepted the new cell, cleared the low-battery flag, and held a stable 3.6V float voltage under the panel's standby draw.
• Post-installation conditioning on Tyxal + panels: Do not run a zone or siren test immediately after swapping the cell. The Tyxal + panel requires 24–48 hours on float charge before its internal voltage monitor reports accurately — running a test too early will generate a false low-battery alert.

Alarm panel showing low battery hours after installing new cell

Li-SOCl2 cells have a passivation layer that forms on the lithium anode during storage. When first installed, this layer causes the cell's terminal voltage to read slightly low under load until it breaks down. The Tyxal + panel samples voltage under its own standby draw and will flag a low-battery condition if it reads below its threshold during this window. Leave the panel powered with the new cell in place for 24–48 hours — the passivation layer disperses, the terminal voltage stabilises at 3.6V, and the panel clears the fault on its next scheduled self-check.

Panel losing zone programming during a power outage after battery replacement

The Tyxal + uses the backup cell to retain zone configuration and RF sensor pairing when mains power drops. If the new cell has not completed its 48-hour conditioning period, it may not yet be delivering the sustained current the panel needs to hold volatile memory during a mains failure. When power is restored and programming is gone, the cell was not yet fully accepted by the panel's BMS. Reinstall the cell, restore mains power, wait 48 hours before testing, then confirm the panel holds its configuration through a deliberate mains-off test.