how many MAH does a lipo lose in 2 weeks

[blueb8llz]

not sure if im reading this correct, but when i plug the balancer and power into the lipo, it reads 7.839 volts. but i only charged it up 50% like 2-3 weeks ago. and my lipo is only a 7.2 volt. at this rate, it seems like i can wait up to like 5-6 months before i charge it up again.... is this right? it can go down to about 3.3v per cell i have a 2s so thats 6.6v.