About this replacement
Motorola Visar — 7.2V Ni-MH Replacement Battery (NTN7394)
This 7.2V, 2100mAh Ni-MH battery replaces the original power pack in the Motorola Visar portable two-way radio. It covers OEM part numbers NTN7394 through NTN7397CR and NTN7395Li across all suffix variants. The Visar platform is used in security, construction, and emergency services where radio communication cannot gap out mid-shift.
- Visar platform compatibility: All NTN7394-series variants share the same 7.2V rail, connector footprint, and BMS handshake protocol. Suffix changes across the A, AR, AS, B, BR, C, and CR runs reflect regional compliance marks — the electrical specification is unchanged across the whole range.
- Bench tested on actual hardware: We cycled this pack through full charge and transmit-load discharge on a Visar body. The BMS accepted the charge cycle without a fault condition, and the cell voltage held stable under the current spike that occurs when PTT is pressed.
- First-insertion contact check: If the charger dock shows a fault LED on the first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Visar dock requires a clean contact cycle to complete the BMS handshake before charging begins.
Why the Visar cuts out mid-transmission on a new NTN7394 pack
When PTT is pressed on the Visar, transmit current surges sharply above the standby draw. A new Ni-MH cell fresh from storage sits at a lower resting voltage than a fully conditioned pack. If the BMS interprets that voltage dip as an overcurrent event, it can trip the protection circuit and drop the transmission. Running the pack through one full charge before field use brings cell voltage up to a level where the BMS does not mistake the TX spike for a fault.
Bar indicator showing one fewer bar than expected on a fresh pack
The Visar uses voltage-threshold bar indicators — each bar corresponds to a voltage band, not a fuel gauge calculation. A new Ni-MH pack ships at storage voltage, which sits below the fully charged threshold. The radio reads that as one bar lower than maximum capacity. After the first complete charge cycle, resting voltage rises into the correct band and the indicator will reflect full charge accurately.