Uniden BP904 Replacement Battery 2.4V 1500mAh Ni-MH

Uniden BP904 / BT904 Series — 2.4V Ni-MH Replacement Battery (BBTY0460001)

This 2.4V, 1500mAh Ni-MH battery replaces the original pack in Uniden cordless handsets including the BP904, BT904, EXP370, and EXP371. It covers OEM part numbers BBTY0460001, BBTY0510001, BBTY0624001, BBTY0700001, BT1007, and BT1015. The physical dimensions are 50.80 x 28.05 x 14.44mm — confirm your existing pack matches before ordering.

• BP904 and BT904 handset compatibility: These handsets share the same 2.4V two-cell NiMH form factor and base-charging circuit. The connector orientation and contact spacing are identical across this model group, so one pack covers the full range listed above.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a BP904 handset. The base station accepted the pack without a charging fault, and the BMS held voltage above the low-battery cutoff threshold through multiple full cycles.
• First-charge protocol for NiMH cordless packs: After installing, seat the handset in the base and leave it for a full 16 hours before the first call. NiMH cells shipped in partial-discharge state need a slow, uninterrupted charge to reach rated capacity — pulling the handset early on the first cycle reduces the ceiling you can reach on all subsequent cycles.

Base station showing no charge light after installing a new NiMH pack

Uniden base stations check pack voltage before committing to a charge cycle. A new NiMH pack that has been sitting in storage can drop below the base's acceptance threshold — typically around 2.0V. The base interprets this as a faulty or missing battery and withholds the charge current. To recover, hold the handset seated firmly in the base for 10–15 minutes; some Uniden bases will trickle at low current first, then switch to full charge once the pack voltage climbs past 2.2V.

Talk time shorter than expected for the first few cycles

NiMH cells do not ship at full capacity — they need three to five full charge-discharge cycles before reaching the rated 1500mAh. If talk time feels short after the first swap, that is normal cell behaviour, not a defective pack. Run the handset until it signals low battery, then return it to the base for a full charge each time. By cycle four or five, capacity stabilises at the rated level.