Thanks Kent,
I just got the 510, the manual says that I should give each batteries an initial 8 hours charge, I didn't do it, I just put it on the charger and when the light went green I started using it... it last for about 20 minutes or so... then I recharge it for 3 hours.
The manual says that it must be charged for 1 hour no matter what the light says, so I supposed the red/green light doesn't do much....
(silly question: are we sure that this batteries are lithium and not nickel?)
I'm charging one battery right now, I'm playing close attention to it, just to see when the green light goes on, if it goes on at the same time, then the charger must have a type of timer or something like that... anyways I just noticed that about ~15 minutes charging the red light started to blink one time to green (it's a really short blink red-green-red) every ~10 seconds!
Is this normal? maybe the charger is checking the battery charge? It's close to 20 minutes complete an hour in the charger and the light is still red... should I wait for the hour? or remove it when it goes green?
How long do you charge 510 batteries? 1 hour? 3?