Olympia C200 Replacement Battery 3.6V 1200mAh Ni-MH

Olympia C200 — 3.6V Ni-MH Replacement Battery

This is a 3.6V, 1200mAh Ni-MH battery for the Olympia C200 cordless telephone handset. It fits the wireless handset unit directly, restoring power to the handset when the original cell has degraded or lost capacity. No OEM part number is published for this battery — fit is confirmed by model and physical dimensions.

• C200 handset fit: The C200 handset runs a 3.6V NiMH cell in a compact three-cell flat pack. The replacement matches that voltage rail and physical footprint — 56.32 x 42.96 x 20.38mm — so it seats correctly in the battery bay without forcing the cover.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on NiMH test equipment. The cell accepted a full charge without voltage anomalies and held resting voltage within spec between cycles. BMS behaviour was stable across all test passes.
• First charge on NiMH cordless handsets: Place the handset in the base immediately after fitting and leave it for a full 16 hours before first use. NiMH cells shipped from storage are partially discharged — a slow first charge lets each cell in the pack reach rated capacity evenly. Skipping this step is the main reason users report short talk time on new batteries.

Range dropping after fitting a new NiMH pack in the C200

DECT handsets draw a short burst of higher current each time they transmit to the base station. A NiMH cell that has not been fully conditioned has higher internal resistance than a broken-in cell. That resistance causes a voltage sag under the RF transmit load, and the handset pulls back transmit power to compensate. After three to five full charge and discharge cycles, internal resistance drops and the range returns to normal.

Base station showing no charge or error light after battery swap

NiMH cells lose voltage during storage, and some base stations use a minimum voltage threshold to detect a valid battery before starting the charge circuit. If the replacement cell has been sitting in a warehouse, its resting voltage may sit below that threshold. Place the handset in the base and wait — most C200 base units will begin a trickle charge after a few minutes once the circuit detects any positive voltage. If the charge indicator still does not appear after 30 minutes, remove the handset, wait 10 seconds, and reseat it to trigger a fresh detection cycle.