GE BT-15 Cordless Phone Replacement Battery 3.6V 700mAh

GE 2-9445 / 2-6936GE2 Series — 3.6V Ni-MH Replacement Battery (BT-15)

This is a 3.6V, 700mAh nickel-metal hydride replacement battery for GE cordless phone handsets using the BT-15 pack. It fits the 2-9445, 2-6936GE2, 5-9519, and 10-0935 models, among others. The battery slots into the handset battery compartment and connects through the same three-tab contact as the original GE pack.

• Multi-model fit across GE handsets: These GE handsets share a common 3.6V NiMH cell arrangement, identical connector footprint, and the same BMS-free passive charging circuit — the base station controls charge termination, not the pack itself. That is why one BT-15 part number covers multiple models.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on GE base station hardware. The base accepted the pack at initial voltage without error, and charge current ramped normally through delta-V termination.
• First-charge protocol for NiMH handsets: After installing, seat the handset in the base and leave it for a full 16 hours before using it. NiMH cells shipped in partial-charge state need a slow, uninterrupted first charge to reach rated capacity — pulling it off the base early shortens every cycle that follows.

Talk time shorter than the original battery after replacement

NiMH cells arrive from storage at reduced capacity — typically 60–70% of rated spec. The first three to five full charge-discharge cycles gradually restore the electrodes to full capacity. Do not judge the battery on the first or second use. Run the handset until the low-battery tone sounds, return it to the base for a full charge, and repeat — capacity increases measurably with each cycle until it stabilises near the rated 700mAh.

Base station charge light stays off or shows error after installing new pack

GE base stations use a voltage window to confirm a valid pack is seated. A battery that has discharged below approximately 3.0V during storage may fall outside that acceptance threshold, so the base refuses to start a charge cycle. Remove the handset, leave the pack to rest for 10 minutes, then reseat it firmly — contact pressure matters on these three-tab connectors. If the base still does not respond, check that all three contacts on the handset are clean and making flush contact before assuming the pack is faulty.