On Monday, October 10, 2016 at 3:50:05 PM UTC-4, Mike wrote:

It's also why some dealers advocate that, for best life on the Lead Acid
batteries, you should always run them fully down, before recharging
them.


That applies pretty much only to NiCd (nickle/cadmium) batteries that will get a 'memory' if not fully discharged with each use. That memory can be dispersed with care, but it can be a real PITA when the submarine in question is about 5 feet down and 40 feet away in a very fast stream. And why I stopped using them.

Peter Wieck
Melrose Park, PA