Venitem Sirene Rio 7.5V Replacement Battery 50110201.R001

Venitem Sirene Rio — 7.5V Alkaline Replacement Battery (50110201.R001)

This is a 7.5V 17000mAh alkaline backup battery for the Venitem Sirene Rio siren unit. It slots into the alarm's internal battery compartment and provides power during mains outages so the siren can still activate. Dimensions are 165.60 × 63.60 × 33.50mm — check these against your existing cell before ordering.

• Sirene Rio siren unit: The Sirene Rio runs its siren driver circuit from this dedicated 7.5V alkaline cell. The voltage rail matches what the siren board expects — no step-up conversion, no signal loss between the panel trigger and the horn output.
• Bench tested on actual hardware: We ran this cell through charge acceptance and load cycles on the Sirene Rio board. The BMS accepted the cell cleanly, and the siren output triggered correctly under simulated alarm conditions without false cutoffs.
• Post-installation float period: Do not run a zone or siren test immediately after fitting this cell. The Sirene Rio panel needs 24–48 hours on float charge before the battery monitoring circuit settles — triggering a test too early will draw the cell down before it stabilises and may produce a false low-battery report.

Alarm panel showing low battery hours after installing new cell

This is one of the most common complaints after a Sirene Rio battery swap, and it is almost always a monitoring circuit timing issue, not a faulty cell. The panel's battery supervision checks voltage under a brief load pulse shortly after power-up — a fresh alkaline cell that has not yet equilibrated can read marginally low under that pulse. Leave the system powered with the new cell in place for a full 24–48 hours. After that conditioning window, run a panel self-test and the low-battery flag should clear. If the fault persists beyond 48 hours, check the battery contacts for oxidation and confirm terminal voltage is above 7.2V at rest.

Siren not sounding on test after backup battery replacement

After fitting a fresh cell, the Sirene Rio introduces a 30–60 second charge-stabilisation delay before the siren output becomes active — this is normal behaviour, not a wiring fault. If the siren still does not sound after that window, check that the battery compartment lid is fully closed and the tamper switch has re-seated correctly, because a tamper fault will suppress the test output on most panels. Confirm the trigger wire from the panel to the siren board is intact and carrying the correct activation voltage. If everything checks out physically, cycle the panel power and retest.