Hagenuk Eurofon C1800 Replacement Battery 2.4V 600mAh

Hagenuk Eurofon C1800 — 2.4V Ni-MH Replacement Battery

This is a 2.4V 600mAh Ni-MH rechargeable battery for the Hagenuk Eurofon C1800 cordless telephone handset. It fits directly into the handset battery compartment and restores wireless operation to the base station. Dimensions are 45.00 × 21.00 × 10.00mm.

• Eurofon C1800 handset fit: The C1800 runs a 2-cell Ni-MH pack at 2.4V nominal. This replacement matches that voltage rail and physical form factor, so the handset charges and communicates with the base station without modification.
• Bench tested on actual hardware: We cycled this pack through a full charge and discharge sequence. The cells accepted charge at the base station's trickle rate and held voltage within the handset's operating window through full draw cycles.
• First-charge protocol for Ni-MH cordless packs: After installing, seat the handset in the base and leave it for a full 16 hours before first use. Ni-MH cells sourced from storage have lower initial capacity — this slow first charge allows the cells to reach their rated 600mAh.

Base station showing no charge light after fitting a new Ni-MH pack

Ni-MH batteries lose charge during storage. If the resting voltage drops low enough, the C1800 base station's charging circuit may not recognise the pack as a valid load and will not initiate a charge cycle. This is a voltage threshold issue, not a faulty battery. Some base stations require the pack voltage to be above roughly 2.0V before the charging IC kicks in. If the charge indicator stays off, remove the handset, wait 30 seconds, and reseat it firmly to trigger a fresh detection cycle.

Talk time shorter than expected in the first week of use

Ni-MH cells do not deliver full rated capacity straight out of the box. The first three to five full charge-discharge cycles are conditioning cycles — capacity builds with each one. If the handset feels like it's running short early, that is normal behaviour, not a defective cell. Run the handset until it drops to low-battery indication, return it to the base for a full charge, and repeat — by cycle five, output should be close to the rated 600mAh.