About this replacement
Weinmann Pump Accuvac Rescue — 12V Ni-MH Replacement Battery (WM10647)
This is a 12V, 3000mAh Ni-MH replacement battery for the Weinmann Pump Accuvac Rescue portable suction unit. It fits the WM15830 and Accuvac Rescue platform. OEM part number WM10647 cross-references directly — no modification required to install.
- Accuvac Rescue platform fit: The WM15830 and Accuvac Rescue share the same 12V supply rail, F2X5 connector layout, and BMS handshake protocol. Swapping between compatible models on this platform works without a firmware prompt or charge-cycle reset on the device side.
- Bench tested on actual hardware: We ran charge and discharge cycles through the WM10647 circuit, confirmed the BMS accepted the new cell pack without a fault flag, and verified the charge IC reached termination voltage before the indicator stepped to full.
- Power-on self-test after installation: The Accuvac Rescue runs a BMS verification sequence at every startup. Do not interrupt this cycle after fitting a new battery — cutting power mid-sequence stores a false battery fault that persists until the next full reboot. Let the self-test complete before use.
Low battery alarm triggering immediately after a confirmed full charge
The Accuvac Rescue BMS calibrates its low-battery threshold against charge history, not just terminal voltage. A new cell pack has no history, so the BMS applies a conservative pass threshold at first startup. The alarm clears after one complete charge-to-discharge cycle that lets the BMS log actual capacity data. Run one full cycle before drawing any clinical conclusion about battery state.
Device not powering on after battery sat in storage
Ni-MH cells self-discharge at roughly 1–2% per day. A cell pack that sat in a warehouse for several months can drop below the Accuvac Rescue's BMS recovery threshold — typically around 9V for a 12V Ni-MH pack — and the device will not boot. Connect the charger and leave it for a full charge cycle without attempting to power on. If the charge indicator does not activate within 30 minutes, check charger output voltage at the connector — it should read between 13.5V and 14.5V.