P4 Pro battery contacts,

[Benji]

I have a spare P4 Pro battery which I want to use to power another device (not a drone) with. I have tried all the combinations of the multiple contacts in the connection socket but can not get a voltage reading on any of them.

Any clues, please?

 

[tml4191]

Get something like an omnicharge instead

 

[hunch]

I have a spare P4 Pro battery which I want to use to power another device (not a drone) with. I have tried all the combinations of the multiple contacts in the connection socket but can not get a voltage reading on any of them.

Any clues, please?

you need to turn it on. just like you would when turning on the Phantom with battery installed. (short press, long press)

"-" is on the outside of the connectors (raised) and "+" is in the middle (lowered) connectors.

 

[Benji]

Thanks, hunch. I wasn't turning the battery on before--duh. I turned it on & got a reading of 13.81 volts. I'm going to teed it into a regulator to end up with 7.8 volts to power a video camera.

Thanks for your help.