My old battery was run down. The fan of the computer only stopped more then the carcass was still warm. With the new battery, the computer less warm, but I can not seem to increase the availability of the battery> 93%. Full autonomy available in absence of mains and pulling every economy possible cons, remains less than 2 hours. Either it's my diet that does not reach the float voltage of the new battery (but is said to be compatible) or a battery that is already in storage since qq time and showing the first signs of fatigue. At least, my biggest worries is set: my computer less warm.