Diagnostics with bright LED indicator communicates battery charge status: charged, charging, power problem, and battery too hot or too cold True, I've gotten no questions asked replacements for both a DCB102 dual-port charger and a DCB204 4Ah battery. I called a service center for the charger, which requested that I send it to them but told me that DeWalt would replace the charger instead of having them repair it. Sure enough, I got a new charger a few days later. The battery was the one I mentioned above. before I found that it was corroded, I submitted a warranty claim with the manufacture code to DeWalt and they sent a new battery immediately. Dewalt batteries should have a 3 year warranty from either a receipt or the build date on the battery. I'm not familiar with the charger warranty but it must be at least a 1 year warranty. Ive sent a few in to a factory service center over the years without a receipt just using the date code on the battery and they send out new ones. I've also heard of people just calling Dewalt and they just send out new batteries.