V Tech 80-3328-00-03 Cordless Phone Replacement Battery 3.6V 2000mAh

V Tech 8033280003 Series — 3.6V Ni-MH Replacement Battery (80-3328-00-03)

This is a 3.6V, 2000mAh Ni-MH rechargeable battery for V Tech cordless DECT phone handsets. It replaces OEM part numbers 80-3328-00-03, 80-4032-00-00, 80-4134-02-00, 80-4290-00-00, and 80-4314-00-00. It fits models including the 8033280003, 8040320000, 8041340200, and 8042800000, among others.

• Cross-model fit across the V Tech DECT range: These handsets share a common 3.6V Ni-MH cell configuration, the same physical footprint (53.60 × 42.45 × 15.32mm), and identical connector pinout. That is why one battery pack covers multiple model numbers without modification.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a V Tech handset. The cell voltage held steady at the base station charge contact threshold, and the handset accepted the charge cycle without error lights on the first attempt.
• First-install charge on NiMH cordless handsets: After fitting this battery, seat the handset in the base station and leave it for a full 16 hours before first use. NiMH cells ship partially discharged. A slow initial charge lets each cell reach rated capacity — skipping this step is the single most common reason a new battery underperforms.

Base station showing no charge light on a new NiMH pack

NiMH batteries lose charge slowly during warehouse storage. If the cell voltage drops far enough, some V Tech base stations will not initiate a charge cycle at all — the charge indicator stays dark and the handset appears dead. This is a voltage threshold issue, not a faulty battery. Place the handset firmly in the base, confirm the contacts are clean and making full contact, and leave it undisturbed for at least two hours. Most base stations will detect the rising cell voltage and switch the charge light on once the pack climbs above the acceptance floor.

Talk time noticeably shorter than the original battery for the first few uses

NiMH cells do not deliver full rated capacity straight out of the box. Capacity builds over the first three to five full charge-and-discharge cycles as the cells condition. After each full charge, use the handset until the low-battery indicator activates, then return it to the base for a complete charge. By cycle five, the pack should be delivering close to the rated 2000mAh and talk time will stabilise.