Robert Noble

I purchased two Mugen 1800mah batteries 6 months ago and they both loosing power. The batteries started off great, I would get 3:52 hours, after a month it dropped to 3:24 hours. Now I can charge batteries use them for 5-10 minutes and the indicator will go from 100% to 70%.

My original Dell batteries have never lost this much power in such short period of time, has anybody else experience this problem?

rlarson_mn

I would contact the supplier about this issue. These people have a good reputation accourding to other thread postings on this site. Perhaps then will do an exchange with you just to get the batteries you have for their testing of the issue with them.