GE 29519A Cordless Phone Replacement Battery 3.6V 600mAh

GE 29519A / 29630A Series — 3.6V Ni-MH Replacement Battery (BT-11)

This is a 3.6V, 600mAh Ni-MH rechargeable battery for GE cordless phone handsets. It fits the GE 29519A, 29630A, 52189A, and 52310 series, along with two additional compatible models. The battery slots into the handset compartment and connects to the existing charging contacts.

• 29519A / 29630A / 52189A platform: These models share the same 3.6V single-cell NiMH configuration, connector orientation, and charging circuit voltage threshold. The base station on each charges at a trickle rate matched to this pack's 600mAh rating.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a GE handset base station. The BMS accepted charge without fault indication, and the cell voltage held within spec across five full cycles.
• First-charge protocol for NiMH handsets: After installing, seat the handset in the base for a full 16-hour charge before making any calls. NiMH cells in cordless phones need this slow initial charge to reach rated capacity — skipping it shortens usable talk time from the first cycle.

Base station showing no-charge light after swapping to a new NiMH pack

NiMH batteries self-discharge during storage. If the cell voltage drops far enough, the base station's charging circuit may not recognise the pack as ready to charge and withholds current. This is a voltage threshold issue, not a fault with the battery or the base. Place the handset firmly in the cradle for at least 30 minutes — the trickle circuit on most GE bases will eventually bring the cell up past the acceptance threshold. If the charge indicator still won't activate, confirm the handset is seated so the contacts are fully engaged, then check the cell voltage is reading above 3.0V before assuming a fault.

Talk time shorter than the original battery after the first few uses

New NiMH cells don't deliver their rated 600mAh on the first discharge — capacity builds over three to five full charge-discharge cycles as the cell chemistry stabilises. This is normal and not a sign of a defective pack. Run the handset down to the low-battery warning, then return it to the base for a full charge each time. By cycle four or five, talk time should reach the level the original battery provided when it was new.