So I got this battery/charger a while ago and I'm wondering if there are any special things I should know to keep it working better/longer.

I've heard all kinds of things about different types of batteries and how for some, you shouldn't run them all the way down, or you should make sure to run them all the way down and charge them all the way up a few times when you first get them, or whatever.

Is there anything like this for NiMh batteries?? Oh it's powering a 20w 12v halogen pond/bike light if that makes any difference.