Laptop Batteries are very hit and miss.
My corporate HP Elitebook is 5 months old and the battery is knackered. 
I get barely 15 minutes of power out of it. HP support say that this is 
normal. The whole lappy is being replaced next month with a 17in screen 
version. I can only hope that the battery is a whole ot better than the 
Elitebook.
On the otherhand, my 2007 Macbook Pro (17in) is still on its original 
battery and even with the upgraded RAM(8Gb) and HDD (1Tb) I get 3 hours 
of life out of it.
My old netbook (MSI WInd) battey barely lasted a month. I sent the whole 
thing back and battled with the supplier to get my money back.
My ancient Dell Inspiron 8600 still holds its charge and that is with 
its original battery.
You pays your money and takes your choice.
Stephen D
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