V Tech 239069 Cordless Phone Replacement Battery 3.6V 600mAh

V Tech 239069 Series — 3.6V Ni-MH Replacement Battery (80-1338-00-00)

This is a 3.6V, 600mAh Ni-MH replacement battery for V Tech cordless phone handsets in the 239069 compatibility group. It fits handsets using part numbers including BT163345, BT263345, BT17233, BT27233, and BT27333. When the original cell no longer holds a charge, this pack restores full handset operation.

• Cross-compatible handset group: These V Tech models share a 3.6V three-cell NiMH pack with the same connector pinout and physical footprint. The base station charges via contact pins on the handset cradle, and the voltage window is identical across this family — so one pack covers the full compatibility list.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on V Tech handset hardware. The BMS accepted charge from the base station on the first seating, and cell voltage held within spec across multiple cycles without thermal events.
• First-charge protocol for NiMH cordless packs: After installing, seat the handset in the base and leave it for a full 16 hours before using it. NiMH cells in cordless phones ship partially discharged — a slow first charge lets each cell reach rated capacity and sets the baseline for subsequent cycles.

Base station charging error on a freshly installed NiMH pack

V Tech base stations check for a minimum voltage at the cradle contact pins before starting a charge cycle. A battery that has sat in storage for months can drop below that acceptance threshold — typically under 3.0V — and the base reads it as a fault rather than a discharged cell. Seating and reseating the handset a few times sometimes triggers the charge circuit to retry. If the base still shows an error, a brief trickle from a compatible external NiMH charger at the correct cell count can bring the pack above the acceptance floor so the base takes over.

Range drops noticeably mid-call after swapping the battery

The DECT transmitter in these handsets draws a short high-current burst every time it communicates with the base. A new NiMH pack that has not been conditioned yet has higher internal resistance, which causes voltage to sag under that RF load. When voltage sags far enough, the handset reduces transmit power or drops the link entirely — this shows up as static, cut-outs, or shortened range. Run three to five full charge-discharge cycles through the handset and the internal resistance will fall, keeping voltage stable under transmit load. After conditioning, range should return to what the original battery delivered.