What you are talking about is those pulse chargers - and that my friend is just ways for people like Snap On to make money. The whole idea that a dry cell battery can't be charged normally is false. When the batteries first came out there were theories that they needed a different charger... so Snap On came out with that wonderful Pulse charger made "just for dry cell batteries." It was just a marketing ploy, lots of people went "!! :O were going to have to have one of those, because everyone is going dry cell!"supra_supra said:Nothing is wrong with optima's. The only problem with them is that there dry cell batteries which means you have to watch how you charge them. You can't slap any charger on it or it may ruin the battery. You need a certain charger and charge rate if I remember correctly..
Dry cells are really quality batteries, and your everyday "maintenance free" are really good batteries too - but with any battery you have, longevity depends on use.