have a problem with my lipo batteries need info please

[stevef12005]

hi everyone, i have a problem with my to Fullriver 1800maH 11.1v lipo batteries, now ive not been to helis for that long but to like use this forum & it's a better class of people,
when i got my heli it came with these 2 batteries & they were good so i brought an esky lipo balance charger to try & keep them a bit better, but now they seem to take a longer time to charge & now only giving me about 7min fight time.
when they run out i place them on a 12v light to make sure that they discharge before i charge them again
can anyone shed a light on this
many thanks steve

[frogbmth]

Discharging LiPo packs damages capacity, they should not be allowed to drop below 3v per cell, so thats 6v in all for 2cell packs and 9v for 3cell packs.

[stevef12005]

Ah, so have i knackered them or could i save them ????

[bbeverlie]

You'll need to get a better charger, The esky and like chargers are very poor
and stop charging when one cell reaches a full charge! FMA sells a decent
charger for $79 that will also discrarge for storage and have a repaire mode!

But you will need a 12v power supply, Which you can may from and PC power
supply!

[stevef12005]

thanks i will look into it, thanks again
cheers steve

[frogbmth]

I use the Graupner Ultramat 14 charger, it is mains and 12v for around £60