lithium ion car and motorcycle batteries

Very good read Rusty, I never thought about the reserve capacity. I was looking at the lightvweight, and getting away from the lead acid. The more plate surface area i guess i can prob assume the more capacity.

I am sure because of the light weight, and no lead/acid the car companies will start looking at these in a car sized reserve for new vehicles. Once produced en mass the costs will go down.

Now i was looking at the capacities of the Li batteries online. Typical motorcycle one has 25 minutes reserve. Can i assume correctly thats with everything switched on drawing max amperage out of the battery? To give it that rating? If so can that time be extended by making the electrical system more efficient? I plan on using LED bulbs for all circuits that would remain in a constant on position like taillight bulbs, running lamp/turn signal bulbs, dash lamps. The car wont have a stereo. Its a radio delete car, i am keeping it this way. Only big draw would be headlamps, electric fans on the engine.

What about using 2 Li motorcycle batteries with 25 min reserve connected in parallel? Your reserve should double to 50 minutes, amperage should double, voltage should stay the same.

Still light weight and compact at 4lbs, plus i think the reserve number a battery company uses is based on max amperage draw from the battery, because of accessory loading as a worst case scenario. If your total amp draw from the battery in lets say an alternator failure is less than what the manufacturer used to determine the reserve capacity, then shouldent your reserve capacity in minutes go up?

I am just throwing out some hypotheticals here. Is there anybody on this site with a battery/electrical backround here that can prove or disprove my theory on this?

Matt