Audioline 5015 Cordless Phone Compatible Battery 3.6V 800mAh

Audioline 5015 — 3.6V Ni-MH Replacement Battery

This is a 3.6V, 800mAh Ni-MH rechargeable battery for the Audioline 5015 cordless DECT phone handset. It slots into the handset battery compartment and powers the unit during calls and standby. Capacity figure is taken directly from product data — 800mAh, 2.88Wh.

• Audioline 5015 handset fit: The 5015 handset runs a 3.6V NiMH cell at this form factor — 44.77 × 30.71 × 10.57mm. The voltage rail and connector match the original pack, so the base station's charge circuit sees the same load it expects.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a NiMH-compatible analyser. The BMS accepted the full charge without cutoff errors, and voltage held steady under simulated RF transmit load.
• First-charge conditioning for NiMH handsets: After installing, seat the handset in the base and leave it for a full 16 hours before first use. NiMH cells shipped in partial-charge storage states need this slow initial charge to reach rated capacity — skipping it leaves the pack at 60–70% of spec for the first few uses.

Talk time shorter than the original battery after replacement

NiMH cells don't deliver full rated capacity straight out of the box. The electrolyte needs activation across three to five full charge-discharge cycles before the pack reaches 800mAh. If talk time feels short in the first week, that's the cause — not a fault. Run the handset until it signals low battery, then charge fully in the base each time. By cycle five, capacity should be at or near spec.

Base station shows no charge light or flashes an error on a new pack

NiMH batteries lose voltage in storage — a pack sitting in a warehouse can drop below 3.0V. Some Audioline base stations won't initiate a charge cycle if the pack voltage is too low on insertion, reading it as a fault rather than a depleted cell. The fix is a trickle charge: some bases recover the pack automatically after a few minutes, others need the handset removed and reinserted once. If the error persists after two insertions, check the handset contacts are clean and making firm contact — target a stable 3.6V on the handset's charge pins before assuming a fault.