Winland D-011-0183 Compatible Battery 7.4V 2600mAh Li-ion

Winland D-011-0183 / EAPro Gateway — 7.4V Li-ion Replacement Battery (57685-101)

This 7.4V 2600mAh Li-ion cell replaces the internal backup battery in the Winland D-011-0183, EnviroAlert Professional EAPro Gateway, and EAPro-GTWY security monitoring units. When mains power drops, this cell keeps the panel alive and logging. Capacity is 2600mAh (19.24Wh) — matching the original specification exactly.

• D-011-0183 and EAPro Gateway platform: Both units share the same 7.4V two-cell Li-ion architecture, identical connector pinout, and the same BMS handshake protocol — which is why a single cell covers all three model numbers listed above.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the EAPro platform. The onboard BMS accepted the cell without fault codes, held voltage within spec under load, and transitioned cleanly between mains and backup states.
• Post-installation conditioning for Winland panels: Do not run a zone or siren test immediately after swapping this cell. Allow 24–48 hours on float charge first. The Winland BMS reads cell state during diagnostics — a partially charged cell will trigger a false low-battery alert even when the cell itself is fine.

Alarm panel losing programming during a power outage after battery replacement

When a fresh cell is installed, the Winland panel's BMS needs time to fully accept and condition the new battery before it will deliver sustained backup current. If the panel goes to battery before that conditioning window closes, it may drop voltage faster than expected — causing memory loss or a full reset. This is not a cell defect. The panel requires the cell to sit on float charge for a minimum of 48 hours before it can reliably sustain programming through an outage. After 48 hours, verify the panel shows no low-battery indicator and resting voltage reads at or above 8.0V before testing.

Siren not sounding on test after backup battery swap

Winland security panels impose a charge-stabilisation delay of 30–60 seconds when a new cell is detected. During this window, the siren circuit is suppressed to prevent false alarms triggered by the brief voltage transient at the moment of cell connection. If a test is triggered too soon, the siren will not respond — the panel is behaving correctly, not faulting. Wait at least 60 seconds after closing the battery compartment before initiating any test, then verify cell voltage is above 7.8V at rest before concluding the test result is valid.