Forgot to say. The "Track Air system" is designed to keep the battery cool so unlike a normal battery you can do an element of "opportunity charging" which I presume is the "quick charge " mentioned? Also has environmental benefits over a conventional battery. Would suggest you contact Hoppecke for more info. Plus these are a lot cheaper than a Gell Battery. In my opinion Gel batteries are only any good on 12v machines were people don't top convential batteries up leading to premature failure.