*** FREE WITH ALL ORDERS OF $325 OR MORE, BEFORE TAX AND SHIPPING, WHILE SUPPLIES LAST***
We've been using these 750mA battery maintainers in our shop for a few years now, and we really like them because they're compact and work well to maintain all types of 12v batteries (Wet, Gel, and AGM).
They come with both alligator clips and ring terminals (with fuse) so that you can connect them in the manner that you choose. The chargers feature a 4-stage automatic charging process, where they start Stage 1 at full power to bring the battery up to 90% charge, then reduce power in Stage 2 until the battery is fully charged. Stage 3 is maintenance mode, where they trickle power to the battery to keep it topped off, and finally, Stage 4 is a short boost 1x per day where it goes up to full power again to prevent battery stratification & sulfation (leading cause of battery failure).
PLEASE NOTE: These are not battery "chargers" or "jump starters." They will NOT revive a completely dead battery. Your battery must have at least 4.0v of power for the maintainer to begin operation. These are designed to keep vehicles that are not daily driven from having their battery drained by the constant slow drain of modern vehicle electrical systems.