AEMC 2960.21 Model 1060 Replacement Battery 9.6V 3500mAh

AEMC 1060 / 5050 / 5060 / 5070 Series — 9.6V Ni-MH Replacement Battery (2960.21)

This is a 9.6V 3500mAh Ni-MH replacement battery for the AEMC power quality analyzer series. It fits the 1060, 5050, 5060, and 5070 instruments along with seven additional compatible models. Voltage, connector, and BMS handshake match the OEM specification for these portable field analyzers.

• 1060 / 5050 / 5060 / 5070 platform fit: These models share a common 9.6V sub-C Ni-MH pack format with the same physical footprint and contact configuration. The BMS expects the same charge termination curve across all units, so one pack covers the entire platform.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on the analyzer platform and confirmed the BMS accepted the pack without error flags. Probe initialisation current spikes at power-up did not trip the protection circuit.
• Post-install calibration cycle: After installing this pack, run a full calibration cycle through the instrument menu before field deployment. The 1060 and 5000-series units map battery state during calibration — skipping this causes premature low-battery warnings during the first measurement session, even with a fully charged pack.

BMS lockout after the analyzer sat unused in a carry case for months

Ni-MH cells self-discharge even in storage. If the 1060 or 5000-series unit sat unused for several months, the pack voltage can drop below the BMS recovery threshold — typically around 7V for a 9.6V Ni-MH pack. At that point the protection circuit latches off and the instrument shows no response at power-on, which looks like a dead instrument rather than a discharged battery. Connect the charger and leave it for at least 30–60 minutes before attempting to power on — most BMS circuits in this class require a trickle pre-charge phase to recover. If the charger LED does not respond within two hours, the cells have dropped below recoverable voltage and the pack needs replacement.

Readings resetting or logging session dropping out mid-measurement

A degraded or partially charged Ni-MH pack can hold a stable open-circuit voltage but sag sharply once the analyzer's measurement modules draw sustained current. On the 5050 and 5060 in particular, active logging sessions pull a higher continuous load than standby, and a voltage dropout under that load triggers a soft reset of the measurement firmware. The instrument may restart and lose the active log without showing a low-battery warning first. If sessions are cutting out before the battery indicator drops below half, charge the pack fully, then verify resting voltage reads at or above 9.6V before the next deployment.