from my experience, be cautious about super-quick chargers (15mins, 30 mins, 1 hour, etc) because I realize that they tend to result in shorter life-span for the batteries. I'm doing normal charging speed now with my current batch of batteries and they are still holding charge; as compared to my previous 2 sets which died after 8 months (excluding sanyo problem batch)
just bought a GP charger today at alan shop. Hmm.. they having some good offer. Now looking for 4 more 2500 batt. Shld be getting the sanyo one instead. By the way, can normal charger charge those higher capacity one? It doesn't matter right?