Panasonic ES4853 Replacement Battery 1.2V 1100mAh Ni-MH

Panasonic ES4853 Series — 1.2V Ni-MH 1100mAh Replacement Battery

This is a 1.2V Ni-MH battery rated at 1100mAh (1.32Wh), built to replace the original cell in the Panasonic ES4853, ES4853S, and ES4853W electric shavers. It fits the same footprint as the factory cell at 34.80 × 16.70 × 16.70mm. Replace this when the original no longer holds enough charge to complete a shave.

• ES4853, ES4853S, ES4853W compatibility: All three variants share the same motor assembly, battery bay dimensions, and voltage rail. One cell spec covers the full range — no adapter or rewiring needed.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the ES4853 platform. The motor drew consistent current across cycles, and the BMS protection circuit triggered at the correct low-voltage threshold without false cutoffs.
• Post-wash drying before charging: The ES4853 is water-resistant, so many users rinse it and dock it immediately. Moisture sitting on the charging contacts bridges them and trips a BMS protection fault — the shaver then reports as dead rather than as a charging error. Shake out the head and let the port air for several minutes before connecting the charger.

Capacity fade from daily partial charging on the ES4853

Ni-MH cells are sensitive to shallow cycling. If you top up the ES4853 after every shave rather than letting it discharge more fully, the usable capacity shrinks over months. The battery gauge drifts, and the shaver starts cutting out earlier than the indicator suggests. Running the cell down to near-empty before a full charge resets this drift and slows future fade. A new cell on a reconditioned charge cycle will restore full indicator accuracy from the first charge.

Shaver motor speed dropping before the indicator reaches empty

This is voltage sag under motor load — not a flat battery. The Ni-MH cell's internal resistance rises as it ages, so voltage dips sharply the moment the motor draws peak current, even when the indicator still shows charge remaining. The BMS reads the voltage drop and cuts power to protect the cell. A fresh cell with lower internal resistance holds voltage steady through the motor's load spikes. If the new cell still sags, check that the contact tabs are seated fully against the cell terminals — a loose connection adds resistance and mimics a degraded cell.