Dremel 750-02 Replacement Battery 4.8V 2000mAh Ni-MH

Dremel MiniMite 750-02 Series — 4.8V Ni-MH Replacement Battery (5000755-01)

This is a 4.8V, 2000mAh Ni-MH replacement battery for the Dremel 750-02, MiniMite 750-02, 755-01, and 7300 series cordless rotary tools. It replaces OEM part number 5000755-01. The Dremel rotary platform runs grinding, cutting, sanding, and engraving attachments from this compact 9.6Wh cell pack.

• 750-02, 755-01, and 7300 platform fit: These models share the same 4.8V two-cell Ni-MH pack format, identical connector pinout, and the same mechanical housing latch. The BMS handshake on each model reads cell voltage and temperature via the same thermistor line, so one pack covers the full family.
• Bench tested on actual hardware: We cycled this pack on a 750-02 under variable load — switching between Dremel EZ Lock cutting discs and drum sander attachments. The BMS held stable across repeated inrush spikes at trigger pull, and cell temperature stayed within spec across ten continuous cycles.
• Break-in on the 750-02 rotary platform: Run the tool at low speed (under 15,000 RPM) for the first two full discharge-recharge cycles before applying maximum load. Ni-MH cells in this compact housing need those initial cycles to equalise cell capacity across the two-cell series stack before the BMS sets its overcurrent baseline.

BMS overcurrent trip on trigger pull in the Dremel 750-02

The Dremel 750-02 motor draws a short inrush spike at trigger pull — particularly when a cutting or grinding attachment is already loaded against a workpiece. On a new or cold pack, the BMS may read this spike as an overcurrent event and cut the output rail before the motor reaches operating speed. This is more common in cold conditions, where Ni-MH internal resistance rises and amplifies the voltage dip during inrush. Starting the tool unloaded — not pressed against material — lets the motor spin up before the BMS sees a sustained current draw.

Charger not recognising the 5000755-01 pack after storage

Ni-MH packs stored for more than two to three months can drop below the charger's acceptance threshold — typically around 3.5V for this two-cell 4.8V pack. The Dremel OEM charger checks cell voltage before initiating the charge cycle and will reject any pack that reads too low. To recover the pack, apply a short manual trickle charge using a universal Ni-MH charger set to 0.1C (200mA for this 2000mAh pack) for 30 to 60 minutes until voltage climbs above 4.0V. Once the pack reaches that threshold, transfer it back to the Dremel charger and it will begin a normal charge cycle.