Grundig 8875 Replacement Battery 2.4V 2000mAh Ni-MH

Grundig 8875 / 8825 / 8835 — 2.4V Ni-MH Replacement Battery

This is a 2.4V, 2000mAh nickel-metal hydride battery for the Grundig 8875, 8825, and 8835 cordless electric shavers. It replaces the original cell when the shaver loses charge capacity after repeated cycles. Voltage and form factor match the original — 48.73 × 28.68 × 14.31mm.

• 8875, 8825, and 8835 compatibility: These three Grundig shaver models share the same battery housing, voltage rail, and connector layout. One cell covers all three without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the 8875 platform. The BMS accepted the cell without error, and motor speed held consistent across the discharge curve until the low-battery cutoff triggered.
• Charging port care after wet shaving: If you rinse this shaver under water, let the charging port air-dry fully before placing it in the dock. Moisture bridging the dock contacts can trip a BMS protection fault — the shaver then reports a dead battery rather than a charging error, which sends most users down the wrong repair path.

Capacity fade from daily partial charging on the Grundig 8875

Ni-MH cells in shavers used daily rarely deplete fully before the next charge. That shallow-cycling pattern compresses the active charge range the cell uses, so the battery indicator starts drifting — showing full charge when actual capacity has dropped significantly. The cell isn't faulty at that point; it has simply learned a narrow operating window. A full discharge-to-cutoff followed by a complete charge resets the cycle and re-calibrates the indicator. If the shaver still cuts out early after two full cycles, the cell has degraded past recovery and needs replacing.

Motor speed drops noticeably before the low-battery indicator activates

Under shaving motor load, a degraded Ni-MH cell sags in voltage before it hits the BMS cutoff threshold. The shaver motor draws enough current to pull the cell below its stable operating voltage — you feel the speed drop before the indicator reacts. This is voltage sag under load, not a firmware or motor fault. Fitting a fresh 2000mAh cell restores the voltage headroom and the motor runs at full speed again. Confirm the dock output reads 2.4V before ruling out a faulty charger.