M8 charging jack polarity?

[zoomzoombang]

does anyone know for certain the polarity for M8 charging jack? I am guessing +ve inner, -ve outer but am too afraid to fry electronics to test. thanks.

[dobber]

The positive is always the inner and the negative is always the outer.

[mattybucks]

I've read that you should really charge through the jack, you should take the cells out of the tx, and let them rest for a while after charging before plugging back in, something to do with a voltage spike blowing a fuse in the tx.

[zoomzoombang]

dobber & mattybucks: thanks! will take the battery out of the transmitter to charge. Hope it does, been sitting idle for a few years...