Time for some new batteries?

[XTS3000]

The energizer 15 minute charger will kill the batteries fast. I've had tested a few sets of energizers - half never seen the 15 fast charger. The ones that I charged mostly with the fast charger don't hold a good charge anymore, while the slow charged energizers are still going strong. Using the fast charger, the energizers are good for around 100 charges before they no longer hold a good charge. Thats the price you pay to have batteries charged fast.

My theory: the faster you charge the batteries, the fewer cycles you'll get from them.