bad batteries??

i bought the ultrafire rechargeable CR2 batteries and the charger but i seem to be having problems with it
i used the batteries my laser untill my laser went dim...so i decided it was time to charge them,
i put them into the charger, and it lit up a little green LED light, then i plugged the charger in, and according to the packaging it is suppose to take like 6 hours to charge them......
waited six hours, took them out, and now they are putting out like 0.18 volts!

not to mention one fo the four batteries i bought doesn't hold a charge at all.

am i doing something wrong??

maybe i will jerry rig the battery up to my camera's batter charger, it's for a 3.6v battery at like 3.4wh (is that 3400mah?)

but my batteries are 800 mah

i'll put it up the the charger for just a bit and see if the batteries even hold any kind of charge.
it is weird for them to only work the first time......maybe the problem is with the charger and not the batteries?

ok nevermind... something was wrong with the charger...not sure what.

i was trying to rig up the batteries to a diff charger and i took apart my cr2 charger and desoldered teh wires so i could use the battery pads...then that failed so i soldered it back together and now it is charging great

no idea what was wrong but it's working and thats all i care about.