Siemens Gigaset 100 Replacement Battery 3.6V 600mAh Ni-MH

Siemens Gigaset 100 Series — 3.6V Ni-MH Replacement Battery (C39453-Z5-C193)

This is a 3.6V, 600mAh Ni-MH replacement battery for the Siemens Gigaset cordless phone range. It fits the Gigaset 100, 200, A1, T11, and several related handsets that share the same battery bay and connector. Dimensions are 30.30 × 42.60 × 14.30mm — measure your existing cell before ordering if your model isn't listed.

• Gigaset 100 / 200 / A1 / T11 compatibility: These handsets share a common 3.6V single-cell NiMH architecture with the same physical connector and bay dimensions, so one cell covers all of them without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Gigaset base station, confirming the BMS accepted the NiMH voltage curve without triggering a charge fault or error indicator.
• First-charge protocol for NiMH handsets: After fitting, seat the handset in the base and leave it for a full 16 hours before first use. NiMH cells from storage have suppressed capacity — skipping this slow charge means the first several cycles will underperform rated capacity.

Talk time shorter than original battery after replacement

NiMH cells ship in a partially discharged state and need three to five full charge-discharge cycles to reach rated capacity. On the first cycle, you may see noticeably shorter talk time — this is a chemistry characteristic, not a fault with the cell. Each subsequent full cycle conditions the electrode structure further. By cycle four or five, capacity should be close to the rated 600mAh.

Base station shows no charge or error light after battery swap

A new NiMH cell stored for an extended period can drop to a voltage the Gigaset base station treats as a fault condition rather than a flat battery. The charger circuit expects to see a voltage above a minimum acceptance threshold before it begins the charge cycle. Remove the handset, wait 30 seconds, then reseat it firmly — this resets the charge controller. If the error persists, check the handset contacts are clean and making full contact with the base cradle.