About this replacement
Kawasaki 19.2V Unisource Series — 19.2V Ni-MH Replacement Battery (840045)
This is a 19.2V 2000mAh Ni-MH battery pack for the Kawasaki Unisource cordless tool range. It fits the 19.2V Unisource platform and compatible models including 69007, 691235, and 691306. Voltage and chemistry match the original Kawasaki specification exactly.
- Unisource platform compatibility: These models share the same 19.2V rail, physical pack format, and terminal layout. The battery slides into any Unisource-format tool housing without modification — drills, impact drivers, and saws all draw from the same connection point.
- Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a Kawasaki-compatible 19.2V charger. The BMS held steady through inrush current spikes at trigger pull and recovered cleanly after load drops between cuts.
- Motor-start break-in on first use: On the first two cycles, run the tool at half load — mid-trigger on the drill, light cuts on the saw. This lets the pack's protection circuit log the motor's inrush profile before you hit it with full torque or a sustained saw pass.
BMS cutoff on inrush surge during trigger pull
Kawasaki 19.2V Unisource tools pull a sharp current spike the moment the motor starts — this is normal motor-start inrush. On a depleted or cold pack, that spike can exceed the BMS overcurrent threshold and trip a protection cutout before the motor reaches running speed. The result is a dead stop right at trigger pull, even when the pack shows remaining charge. Warm the pack to room temperature and ensure it is charged above 18V before attempting heavy cuts or high-torque fastening.
Charger not recognising the pack after extended storage
Ni-MH cells self-discharge over time, and after several months in storage this pack can drop below the voltage floor the Kawasaki charger uses to confirm a valid battery is connected. The charger may blink an error or simply do nothing. To recover, check the pack's open-circuit voltage — if it reads below 16V, use a compatible Ni-MH charger with a recovery or trickle mode to bring the cells back above the acceptance threshold before switching to a standard charge cycle.