Grundig LC-355 6V Replacement Battery 4200mAh Ni-MH

Grundig LC-355 / LC-400 / LC-410 / LC-450 — 6V 4200mAh Ni-MH Replacement Battery

This is a 6V 4200mAh Ni-MH replacement battery for the Grundig LC-355, LC-400, LC-410, and LC-450 film cameras. It powers the light metering system, film advance motor, and flash capacitor charging circuit. Capacity figures come from product data — 25.2Wh total energy.

• LC-355 / LC-400 / LC-410 / LC-450 compatibility: These models share the same 6V battery bay geometry and draw voltage from the same rail for metering, advance, and flash functions. One cell format covers the full group.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge passes on compatible hardware. The Ni-MH chemistry accepted charge without BMS rejection, and the metering circuit held stable voltage through the discharge curve.
• First charge protocol for Ni-MH film cameras: Ni-MH cells shipped in partial-charge state can cause the light meter to read low on the first few frames. Run one complete charge cycle in the OEM charger before loading film — this lets the cell settle to its full capacity baseline and gives the meter an accurate working voltage.

Flash recycling slowing down late in a Ni-MH discharge cycle

As a Ni-MH cell approaches the bottom of its discharge curve, internal resistance rises. The flash capacitor draws peak current to recharge between shots, and that current sag means longer recycle times — even if the meter still shows charge remaining. On the LC-series bodies, this shows up as a noticeably longer wait between flash-enabled exposures. The cell is not faulty; it is simply near end-of-discharge. Recharge before shooting flash-heavy sequences to keep recycle times consistent.

Film advance motor stalling mid-roll after battery replacement

The film advance motor on the LC-series pulls a short current spike at each wind cycle. If the replacement cell was stored for an extended period, self-discharge in Ni-MH chemistry can bring open-circuit voltage below the motor's start threshold — even though the cell still holds useful capacity overall. The camera interprets this as a dead battery and halts the advance. The fix is a full charge cycle before use; resting voltage should read at or above 6V measured at the cell terminals before loading.