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http://www.xjtalk.com/showthread.php?t=1904

The nice thing about gels is that they don't get hot. They have low resistance and therefore no heat, so all that stuff about charging too fast does not apply

No, you shouldn't mix them. They charge differently, that being the gel will charge before the acid type due to very low resistance in them. So it is possible to completely charge the gel and have...

A day or two, no. But if you leave them that way for a month you will not be able to get them to take a charge. But, Optima claims their own charger fixes that. Not cheap though.

The first thing you may want to decide is what type of battery you want. Regular old lead acid works. But the gel type have a couple of advantages. First, no fumes. So you can use then inside a...