About this replacement
Asskea DC20 / PRO I Secretion Suction Apparatus — 12V Ni-MH Replacement Battery (110651-O)
This is a 12V, 2100mAh Ni-MH replacement battery for the Asskea DC20 and related secretion suction devices. It fits the DC20, DC30, PRO I, and additional secretion suction apparatus models that share the same OEM part number 110651-O. Voltage and capacity match the original specification exactly.
- DC20, DC30, and PRO I platform compatibility: These models share the same 12V battery rail, connector format, and BMS handshake protocol. A single cell chemistry and form factor covers all of them — the BMS on each device reads cell voltage and communicates state-of-charge the same way.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the DC20 platform. The BMS completed its learn cycle after the first full charge-discharge pass, and the charge indicator advanced normally through subsequent cycles.
- Post-installation self-test protocol: After fitting this battery, allow the device to complete its full power-on self-test without interruption. The DC20's BMS runs a startup verification sequence — cutting power during this window registers a false battery fault that persists until the next clean reboot.
Self-test failure after battery swap on the DC20
The DC20 runs a BMS learn cycle at first power-on with a new cell. If the device hasn't completed one full charge-discharge cycle, the internal cell model doesn't match the actual capacity curve of the new Ni-MH cell. This mismatch trips the self-test and the device logs a battery fault. Run one full charge-discharge cycle before clinical use — after that cycle, the BMS recalibrates and self-test passes cleanly.
Charge indicator stalls below 100% on the first charge
On the first charge cycle, the DC20's charge IC applies a conservative current limit to an uncharacterised new cell. This is intentional — the controller won't push full charge rate until it has measured the cell's internal resistance. The indicator may stall at 80–90% for an extended period before completing. Do not interrupt the charge. Let it run to termination, then discharge fully and recharge — the second cycle reaches 100% at normal rate.