Carrera 28.1 Replacement Battery 1.2V 1800mAh Ni-MH

Carrera 28.1 / 28.2 Series — 1.2V Ni-MH 1800mAh Replacement Battery

This is a 1.2V 1800mAh Ni-MH replacement cell for the Carrera 28.1, 28.2, 2028.2PP, and 2028.2 electric shavers. It sits inside the shaver housing and powers the motor directly. Swap it when the original cell no longer holds a charge or causes the motor to cut out early.

• Carrera 28-series shaver compatibility: The 28.1, 28.2, 2028.2PP, and 2028.2 all run on the same single-cell 1.2V Ni-MH configuration. Same voltage rail, same physical form factor at 49.90 × 14.30 × 14.30mm, same connector orientation inside the housing.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the shaver platform. The BMS accepted the cell without error, and motor speed held consistent through the discharge curve without premature cutoff.
• Post-rinse charging precaution: If you rinse the shaver head under water, wait until the housing is fully dry before placing it on the charging stand. Moisture bridging the charging contacts triggers a protection fault the device reports as a dead battery — not a charging error.

Capacity fade from daily partial charging on the Carrera 28-series

Ni-MH cells in shavers degrade faster when they are charged daily before the cell is meaningfully depleted. The shaver's charge indicator measures voltage, not true remaining capacity — so the gauge drifts over time and stops reflecting actual cell state. The result is a battery that reads full but delivers noticeably less motor torque. Letting the cell discharge fully before recharging, roughly every 4–6 cycles, keeps the voltage-to-capacity relationship calibrated.

Motor speed dropping before the low-battery indicator activates

The Carrera 28-series motor draws a short current spike each time the cutting element engages denser beard growth. An aged or deeply discharged Ni-MH cell cannot sustain voltage under that load — speed drops noticeably before the indicator triggers a low-battery alert. This is voltage sag under motor load, not a fault in the shaver itself. A fresh cell at 1.2V nominal resolves the sag; verify open-circuit voltage reads at or above 1.2V before installation.