Siemens FA114 Compatible Battery 6V 4200mAh Ni-MH

Siemens FA114 / FA116 / FA117 / FA118 Series — 6V Ni-MH 4200mAh Replacement Battery

This is a 6V Ni-MH replacement battery rated at 4200mAh (25.2Wh) for Siemens FA114, FA116, FA117, FA118, and compatible camera models. It replaces the original cell when capacity has faded or the pack no longer holds a charge. Voltage and connector format match the original specification.

• FA114–FA118 platform compatibility: These four models share the same battery bay dimensions, voltage rail, and connector pinout. The BMS in each body reads cell voltage on the same threshold curve, so a single replacement cell services the entire group without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a camera body in the FA-series. The BMS accepted the cell on the first charge cycle and reported accurate state-of-charge throughout. No mid-session cutoffs were triggered under combined flash, sensor, and image-processor load.
• First-use charge protocol on Ni-MH camera cells: Ni-MH cells in this voltage class can arrive partially discharged from storage. Run one full charge cycle inside the camera body or OEM charger before your first shoot. This lets the BMS calibrate its capacity tracking to the new cell — skipping this step often causes the battery indicator to misread remaining charge from the start.

Flash not fully recycling between shots on a new FA-series battery

The flash capacitor in the FA114 and its siblings draws a sharp recharge current after each discharge. A cell that has been sitting in storage has elevated internal resistance until it has completed a few full cycles. This resistance causes a voltage sag during capacitor recharge, which the camera reads as a slow or incomplete recycle. After two or three full charge-discharge cycles, internal resistance drops and flash recycle returns to normal speed. If it persists beyond that, measure resting voltage — a healthy cell at full charge reads approximately 7.2V open circuit on a 6V Ni-MH pack.

Battery percentage jumping erratically on the FA114 display

Ni-MH cells have a flatter discharge curve than Li-ion, which means the camera's voltage-threshold indicator was calibrated to a specific cell chemistry and capacity. A new replacement cell — especially one from a different manufacturer than the original — can discharge along a slightly different voltage curve. The camera's indicator maps voltage to percentage using fixed thresholds, so it can skip from 80% to 40% or stall at a single reading before dropping suddenly. Run two full charge cycles through the camera body; the BMS re-samples the discharge curve on each cycle and the percentage display stabilises. If it does not settle, confirm cell resting voltage is above 6.0V after a full charge.