Hello! I have a question that has been bothering me for a while, my dad just bought a Toshiba Laptop Satellite A-135 with Celeron M (basic entry level) which the battery only last about 1.5-1.75 hours, is that normal?, I've seen some Toshiba with Centrino last over 4 hours (maybe more, not sure). I heard the centrino CPU's are much more efficient with the Battery duration, I believe is not a brand problem but my questions are: 1-The charge of the battery depends on the low energy consume CPU or the cells on the battery it self? or both? 2-In case the answer is just the battery, can I just upgrade my dad's battery Laptop to make it last longer? 3-If CPU matters, which is the best on that matters? C2D? Turion64x2? CentrinoDuo? Thanks!