Lithium Ion Batteries

So you want to step up to the next level. Lithium Ion is the Bees Knees, no doubt about it.

Lithium batteries allow for a much deeper discharge than lead-acid, and they have a much better cycle life. Overall per Watt-Hour, they are the most economical choice.

Just the Charger

3 amp chargers. Buy one for home and work so you don't have to lug it around.