Motorola OJO Replacement Battery 3.6V 800mAh NiMH

Motorola OJO / PVP-1000 — 3.6V Ni-MH Replacement Battery

This is a 3.6V, 800mAh nickel-metal hydride battery for the Motorola OJO and PVP-1000 cordless handsets. It slots into the handset battery compartment and restores normal cordless operation when the original pack has aged out. Voltage and cell chemistry match the original Motorola specification exactly.

• OJO and PVP-1000 compatibility: Both models share the same 3.6V NiMH battery bay, connector orientation, and charge circuit expectations. The base station charges at a fixed trickle current calibrated for an 800mAh NiMH pack — a different cell count or chemistry would trip the charge circuit.
• Bench tested on actual hardware: We cycled this pack through the OJO base station charge circuit and confirmed the charge acceptance voltage, trickle cutoff behaviour, and handset power-up sequence all matched factory parameters.
• First-charge procedure for NiMH cordless packs: After installing, seat the handset in the base and leave it for a full 16 hours before use. NiMH cells in storage have partially discharged — skipping this slow first charge leaves capacity on the table for the first several cycles.

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

NiMH batteries lose voltage during warehouse storage. If the resting voltage drops low enough, the OJO base station charge circuit may not recognise the pack as a valid load and refuses to start a charge cycle. This is a threshold protection behaviour, not a fault with the battery or the base. To recover, some OJO bases respond to a short discharge-then-charge trigger — place a discharged handset in the base, wait 30 seconds, remove it, then reseat it firmly. If the charge LED still does not activate, check that the battery contacts in the handset are clean and making full contact with the pack terminals.

Talk time shorter than original battery after the first few uses

NiMH cells require three to five full charge-discharge cycles before they reach rated capacity — this is normal cell chemistry, not a defect. On cycle one, a new 800mAh pack may behave closer to 600–650mAh effective capacity. Each subsequent full cycle conditions the cells further and capacity steps up toward the rated 800mAh. Run three complete cycles — full 16-hour charge, then use the handset until it signals low battery — before drawing any conclusions about capacity.