I've got an electronic device which operates, at least it used to operate, using a car battery as a power source. Over time it has begun to complain about low battery voltage which causes the unit to shut down. The battery voltage is fine... when I hook it up to the battery in my car and leave the car running (~14.4VDC while charging) the device will run indefinitely. So... it would appear that whatever is sensing the input voltage is sensing the voltage incorrectly.
So... my options are to open up this device (it's a sealed, ruggedized, evacuated of air, computerized survey total station so this would be my 2nd choice) to have a look at the (no doubt) SMT microcircuitry within, or to find a device which will give me a regulated, say, 13.8VDC from my 12V wet cell.
Can anyone point me at a retailer who sells 12V-12V converters with regulated boosted voltage? I've only found one at
Somebody must make these things, maybe for RV's or sailboats or so solar-powered survivalists can write their manifestos on laptop computers...
Any help greatly appreciated.
Sorry about cross-posting to the repair group but there's no sci.electronics.workaround group.
Dave