sigh.. i just checked my batteries stats. within 3 months, i permanently lost 25% power. total is suppose to be 8800 mAh now when fully charge it's only 6700 mAh. wondering if i should go back and kick a big fuss. and get a new battery. for those who are wondering, mine is a 8x2 cell battery.
my laptop has got 2 batteries which also allows me to hotswap batteries. external battery is 4000mAh and internal 4800mAh, the best i have tested when batteries are new is 8 hours on FULL power on both batteries. and 13 hours on minimal power. my laptop is HP nw8240 if you were wondering.