RE: electric starter
Do not increase the voltage if you expect to keep your starter with your stuff and not have to go looking for it all the time. Its as simple as that. No matter how much you agonize and anylyze. Mine all operate at 16.8 volts seven cell packs and various capacitys the all work great the small half A unit I charge all fourteen cells together and the two larger units each seven cell pack is wired to charge with separte dedicated peak chargers. Bottom line all the starters operate at 16.8 volts regardless. The commercial portable starters that operate at 12 volts are in My Opinion a complete waste of money.
After some years now thankfully a number of the other locals are copying this set up and I finally do not have to go looking for my starters, well at least not as much.
John