About this replacement
Panasonic ER160 / ER1610 Series — 1.2V Ni-MH Replacement Battery (WER160L2506)
This is a 1.2V, 2000mAh Ni-MH replacement battery for the Panasonic ER160 series electric shaver. It fits the ER160, ER161, ER1511, and ER1610 among a wider range of compatible models. The cell measures 54.10 × 14.20 × 14.20mm and replaces OEM part numbers including WER160L2506, WER1411L2508, and WER2302L2509.
- ER160 series compatibility: These models share the same cell format, voltage rail, and internal connector layout. The same 1.2V Ni-MH cell services the motor drive circuit across all variants in this range — that is why one part number covers ER161, ER1511, and ER1610 alongside the base ER160.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on an ER-series shaver body. The BMS accepted the cell without fault codes, and motor response under load matched the behaviour of an original cell at comparable state of charge.
- Port drying before charge: If you rinse the shaver head after use, let the charging port air dry completely before docking. Moisture bridging the charge contacts triggers a protection fault the shaver reports as a dead battery — not a charging error. Ten minutes face-down on a towel is enough.
Capacity fade from daily partial charging on the ER160
Ni-MH cells used in shavers are susceptible to voltage depression when repeatedly charged from a shallow discharge. The shaver's charge indicator tracks voltage, not true capacity — so the indicator can show full while the usable capacity has already dropped. Daily top-up charging without a full discharge cycle compounds this over weeks. Running the shaver until the motor audibly slows before the next charge resets the voltage reference and slows fade.
Motor speed drops before the low-battery indicator lights up
Under motor load the cell voltage sags below what the circuit expects before the BMS cutoff threshold is reached. The shaver's indicator reads resting voltage, not load voltage — so the light stays off while the motor has already lost torque. This is a normal characteristic of an ageing or deeply cycled Ni-MH cell, not a shaver fault. Fitting a fresh cell and allowing one full charge cycle to 1.2V before first use restores consistent motor speed under load.