Olympia C100 Cordless Phone Compatible Battery 3.6V 1200mAh

Olympia C100 — 3.6V Ni-MH Replacement Battery

This is a 3.6V, 1200mAh Ni-MH replacement battery for the Olympia C100 cordless phone handset. It slots into the handset battery compartment and restores wireless operation away from the base station. Capacity is 1200mAh — matching the original specification.

• Olympia C100 fit: The C100 handset uses a 3.6V Ni-MH cell pack at this form factor — 52.99 x 44.48 x 15.15mm. The voltage rail and connector position are specific to this model, so the pack seats and charges correctly through the base cradle contacts.
• Bench tested on actual hardware: We ran this pack through the C100 base station charge cycle and confirmed the BMS accepted the charge without triggering an error state. Discharge curves held consistent with the 1200mAh rating across three conditioning cycles.
• First-charge protocol for Ni-MH handsets: After installing, place the handset in the base for a full 16-hour charge before first use. Ni-MH cells in cordless phones are shipped in a partial-discharge state and need a slow, uninterrupted initial charge to reach rated capacity.

Base station showing no charge or error light on a new Ni-MH pack

Ni-MH batteries lose voltage during storage and can arrive below the base station's charge-acceptance threshold. Some cordless phone charging circuits look for a minimum voltage before starting the charge cycle — if the pack reads too low, the base treats it as a fault. This is not a defective battery. Remove the handset, leave it out for 30 seconds, then reseat it firmly so both charge contacts are flush. If the error persists, the pack voltage may need a brief recovery — leave it seated for 10–15 minutes and the base circuit should detect the slow voltage rise and begin charging.

Talk time shorter than expected after fitting a new battery

Ni-MH cells do not deliver full rated capacity immediately after installation — this is a chemistry behaviour, not a defect. The first three to five full charge-and-use cycles are conditioning cycles that allow the cell chemistry to stabilise and reach the 1200mAh rating. Short talk time on day one is normal. Run the handset through at least three complete cycles — full charge in base, then use until the low-battery alert sounds — before judging capacity.