JR Batteries - Best charger analyzer, conditioner
There is a lot of good information in the "batteries and chargers" forum. I am relatively new and use it frequently. One thing that is something you can count on, the supplied chargers will continue to overcharge your batteries and eventually harm their reliability. Or so I have been told.
There are good ones out there and as many opinions to match. I just happen to use the AccuCyle charger/recycler. There are many others probably much better, but this is the one that I use.