Earluer, Joe Allbritten wrote:

Does anyone know where I can purchase a
14 Volt gel cell battery...

In the 25-odd years I've been in soaring, I don't think
I've ever seen a 14-volt gel-cell battery that wasn't
either a twelve and a two or two fours and a six. That's
the way I've always wired them together.

One useful bit of advice I've had on making them was
to stick with cells of the same manufacturer and similar
amp-hour ratings.

Bob K.