Audioline 970 Cordless Phone Compatible Battery 3.6V 300mAh

Audioline 970 / 971 / 971G — 3.6V Ni-MH Replacement Battery

This is a 3.6V 300mAh Ni-MH replacement battery for the Audioline 970, 971, and 971G cordless DECT phone handsets. It fits directly into the handset battery compartment and restores power when the original cell has degraded. Capacity is rated at 1.08Wh, matching the original specification.

• 970 / 971 / 971G handset compatibility: These three models share the same handset chassis, battery bay dimensions, and 3.6V power rail. The connector and cell footprint are identical across all three variants, so one cell fits all.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the 970 handset. The BMS accepted the NiMH pack without error, and the base station charging circuit recognised the cell immediately on dock.
• First-charge protocol for NiMH handsets: After fitting, place the handset in the base and leave it for a full 16 hours before making a call. NiMH cells arrive partially discharged from storage — a slow initial charge lets the cells reach rated capacity. Skipping this step is the main reason buyers report short talk time after a swap.

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

NiMH cells sitting in warehouse storage self-discharge over time. If the cell voltage drops low enough, the Audioline base station charging circuit may not recognise it as a valid battery and will withhold charge or flash an error. This is a threshold issue, not a fault with the cell or base. The fix is to place the handset firmly in the cradle and leave it undisturbed — most base stations will begin a recovery trickle charge within a few minutes once contact is confirmed. If the error persists after 30 minutes, remove and reseat the handset to re-establish the charging contacts.

Range drops noticeably when NiMH voltage sags under RF load

DECT handsets push the transmitter hardest at range limits. When a NiMH cell is not yet fully conditioned, its internal resistance is higher, and voltage sags during the transmit burst. The handset interprets this as low battery and may reduce transmit power or drop the call. This symptom is most common in the first three to five charge cycles on a new cell. After conditioning, internal resistance drops and the cell holds closer to 3.6V under RF load — range returns to normal without any settings change.