Originally Posted by FlyWheel
The way I understand it, fast charging isn't the best thing or any type of battery/pack/cell. At the very least you will shorten the overall life of the battery. The reason nickel batteries can be charged at such high rates is because their chemistry is more forgiving than lithium. It doesn't necessarily mean they like it.
One exception is the A123 series of batteries. Seems these batteries can be charged at just about any rate your charger can put out. Some www.wattflyer.com
modelers are charging them with nothing more than a 12 or 24 volt lead acid battery and a piece of lamp cord, or zip cord.
As for my stuff, I'm charging them at about 2.5C, and my three 6S2P A123 packs have the same exact performance as when brand new, three years, and about 200 flights on each of them.