LifeSOS FH0700-10440C8S 9.6V Alarm Battery 700mAh

LifeSOS Radio Channel / LS-30 — 9.6V Ni-MH Replacement Battery (FH0700-10440C8S)

This 9.6V, 700mAh Ni-MH cell replaces the factory backup battery in the LifeSOS Radio Channel, Control Panel LS-30, and LS-30 8SEH alarm systems. It keeps wireless alarm components operational during mains power loss. Capacity is 700mAh (6.72Wh) — matching the original OEM specification exactly.

• Radio Channel and LS-30 compatibility: These models share a common 9.6V backup rail and the same connector footprint. The eight-cell NiMH stack matches the voltage sequencing the panel BMS expects at startup. Any mismatch here causes the panel to reject the cell and report a fault.
• Bench tested on actual hardware: We ran this cell through the LS-30 charge management circuit. The BMS accepted the cell without fault codes, completed the float-charge cycle, and held the rated voltage under simulated zone-trigger load.
• Post-install float charge period: Do not run a zone diagnostic immediately after fitting this cell. The LS-30 panel requires 24–48 hours on float charge before its BMS registers the battery as full. Testing before that window ends will trigger a false low-battery report on the panel display.

Why the LS-30 panel shows low battery hours after installing a new cell

The LS-30 uses a float-charge monitoring loop that reads accumulated charge current, not just terminal voltage. A brand-new cell starts with low accumulated charge, so the panel flags low battery even if the resting voltage looks correct on a meter. This is not a fault with the cell — it is the panel's BMS working as intended. Leave the panel on mains power for 48 hours and the low-battery indicator will clear without any reset procedure.

Siren does not sound during a test cycle after backup battery swap

The LS-30 siren circuit draws a short high-current burst at trigger. If the backup cell has not completed its initial charge stabilisation, the panel suppresses the siren output to protect the cell from a deep-discharge event on the first draw. This typically resolves after 30–60 minutes on float charge following installation. Run the test cycle only after the panel's charge indicator shows full — if the siren still does not activate, confirm mains power is present and the panel is not in walk-test inhibit mode.