MBO Alpha Cordless Phone Replacement Battery 3.6V 1200mAh

MBO Alpha Series — 3.6V Ni-MH Replacement Battery

This is a 3.6V, 1200mAh Ni-MH replacement battery for MBO cordless handsets. It fits the Alpha, Alpha 1000, Alpha 1010, and CT1000 series phones. Swap it in when the original pack no longer holds a charge through a normal day of use.

• Alpha and CT1000 compatibility: These models share a common 3.6V Ni-MH pack format and use the same physical connector and cell arrangement. The battery bay dimensions — 42.40 x 49.90 x 14.40mm — seat correctly in each handset without modification.
• Bench tested on actual hardware: We cycled this pack through charge and discharge runs on a 3.6V Ni-MH test rig. The cell voltage held steady through the mid-discharge range, and the pack accepted a full charge without thermal anomaly or cutoff trip.
• First-charge conditioning on NiMH handsets: After installing, place the handset in the base cradle and leave it for a full 16 hours before first use. NiMH cordless phone cells need this slow initial charge to reach rated capacity — skipping it leaves usable capacity short of the 1200mAh spec for the first several cycles.

Talk time shorter than the original battery after replacement

NiMH cells ship partially discharged and do not reach full capacity on the first cycle. Most Alpha handsets will show noticeably shorter talk time for the first three to five charge cycles — this is normal cell behaviour, not a fault. Each full charge-and-use cycle deepens the electrochemical activation of the cells. By cycle five, capacity should be at or near the rated 1200mAh.

Base station shows no-charge or error light after fitting a new pack

A NiMH pack stored at low state of charge can present a terminal voltage below the threshold the base station uses to confirm a valid battery is seated. The charger circuit sees the voltage — typically under 3.0V — as an absent or faulty pack and throws an error light instead of starting a charge cycle. Place the handset in the base and leave it undisturbed for 30 minutes. The trickle stage will bring cell voltage up enough for the base to recognise the pack and switch to normal charge mode.