Sorry I don't have a specific URL, but MAHA battery charges are highly regarded in the digital camera field. Try Digital Camera Resource Page for reviews and links.
I noticed in an older thread that someone had a headlamp that required 3 batteries, leading to charging difficulties. Many chargers require matched pairs of batteries to work at all. For a few more $$, MAHA provides a charger that will handle 4 AA or AAA batteries -individually- . It will charge 1, 2, 3, or 4 batteries, and sizes (and residual charge) can be mixed and matched at the same time.
Highly recommended! (No, I don't own stock . . . )