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NEWS | Sept. 20, 2022

SINCGARS ASIP RT-1523E/F: Charging Question and Answer

BLUF: The AN/VRC-91 or similar legacy-mounted system can’t charge the SINCGARS RT-1523E/F battery.

Courtesy photo
Dear Half-Mast,

Can a SINCGARS vehicle adapter assembly (VAA) like the AN/VRC-91 charge the SINCGARS advanced system improvement program (ASIP) RT-1523E/F main battery?
Mr. M.P.

Dear Sir,

Simply put, no.
The reason is that the SINCGARS ASIP main battery is configured as “smart battery system” that communicates as a system with the charger. Like other smart battery systems, this one knows when it’s too hot or too cold and will stop charging if these boundaries are exceeded. All these capabilities evolved after the SINCGARS VAA design was created, and neither the mount nor the radio is configured for this.
However, AN/VRC-132 (V)1 and AN/VRC-135(V)1 mounts do charge the radio's battery, as well as allow the radio to be operated from that battery when the vehicle’s power is off.
These mounts were designed to be operable for several hours without vehicle power to save fuel. Keep in mind that if the batteries in these mounts are completely drained, they’ll need to be placed in a standard battery charger to bring them back to fully operational.
It’s best to keep rechargeable batteries above 25 percent when possible. And remember to turn off the radio when leaving your vehicle.
Finally, these mounts can power the radio directly if the radio’s battery temperature exceeds its safe operating range by bypassing the radio’s battery altogether. 
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