Vodavi 901700 Cordless Phone Compatible Battery 3.6V 600mAh

Vodavi 901700 / B1632 / Wanderer — 3.6V Ni-MH Replacement Battery

This is a 3.6V, 600mAh Ni-MH replacement battery for the Vodavi 901700, B1632, and Wanderer cordless handsets. It slots directly into the handset battery compartment and restores wireless operation when the original pack no longer holds charge. Voltage and capacity match the original specification.

• 901700, B1632, and Wanderer compatibility: All three handsets share the same 3.6V single-cell NiMH pack format, the same physical footprint (40 × 42 × 13.5mm), and the same base station charging contacts — which is why one battery covers the entire platform.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a Vodavi-series base. The BMS accepted charge current from the first cycle and cell voltage stabilised to rated capacity by the fourth full cycle.
• First-charge protocol for NiMH cordless packs: After installing, seat the handset in the base and leave it there undisturbed for a full 16 hours before first use. NiMH chemistry needs a slow initial charge to fully activate all cells — skipping this step leaves usable capacity on the table from day one.

Base station showing no charge or error light after installing a new pack

NiMH batteries lose voltage during storage — a pack sitting in a warehouse can drop below the threshold the base station requires before it will initiate a charge cycle. The base reads the incoming voltage, sees it outside the expected window, and either shows an error light or does nothing at all. The fix is a "boost" or trickle charge: some bases will eventually begin charging if the handset is left seated for 30–60 minutes at rest. If the base still shows no activity after that, check that the handset contacts are clean and making firm contact with the charging pins — voltage at the contacts should read at least 3.0V for the base to accept the pack.

Range drops noticeably when the handset moves away from the base

This happens when the NiMH pack's voltage sags under the RF transmit load — the radio module draws a brief current spike to maintain signal, and a partially conditioned or cold battery can't hold voltage through it. The handset compensates by reducing transmit power, which cuts range before the battery shows any other sign of weakness. Running three to five full charge-discharge cycles conditions the cells to deliver current without the sag. After conditioning, test range again — a fully cycled 3.6V pack at 600mAh should maintain consistent signal to the base station's rated distance.