Daitem SA413AX Replacement Battery 6V 15000mAh RXU06X

Daitem SA413AX / SA700AX Series — 6V Alkaline Replacement Battery (RXU06X)

This is a 6V 15000mAh alkaline backup battery for Daitem wireless alarm panels. It fits the SA413AX, SA700AX, RLD405F, and RLD415F control units. When mains power drops, this cell takes over to keep the panel running and zones active.

• SA413AX and SA700AX platform fit: These panels share the same 6V backup rail, RXU06X form factor, and connector pinout. The BMS in each unit reads cell state the same way, so one battery part number covers the range without modification.
• Bench tested on actual hardware: We ran this cell through a full charge cycle on a SA413AX panel. The BMS accepted the cell, cleared the low battery fault, and held float charge without triggering a tamper or fault flag.
• Post-install float charge period: Do not run a zone or siren test immediately after fitting this battery. Allow 24–48 hours on mains power first so the panel can bring the cell to full float charge. Testing before that window closes can cause the panel to report a false low battery condition.

Alarm panel losing saved programming during a mains outage after battery replacement

A freshly installed alkaline cell does not deliver full rated voltage to the panel immediately. The Daitem BMS needs the cell to sit on float charge for up to 48 hours before it recognises the battery as fully conditioned. If a power outage hits during that window, the panel may draw from an under-conditioned cell, drop below the minimum hold voltage, and lose its zone configuration. The fix is straightforward: after fitting the RXU06X, keep the panel on mains power for a full 48-hour period before the backup battery is considered ready for a real outage.

Panel displaying low battery fault within hours of fitting a new RXU06X cell

This is one of the most common post-replacement reports on Daitem panels and it is almost always a float charge timing issue, not a faulty cell. The panel's battery monitoring circuit compares cell voltage against a threshold — a new alkaline cell sitting at open-circuit voltage has not yet stabilised under load, so the panel flags it as low. Leave the panel powered on mains for 24–48 hours. If the fault has not cleared after 48 hours, check that the battery connector is fully seated and measure cell voltage directly — it should read above 6.0V under no-load conditions.