Business notebooks new HP EliteBook 2540p can run a circuit 12.5 hours, more notebooks Lenovo's ThinkPad X201s about 20 minutes.

To achieve the time, buyers EliteBook 2540p (and ThinkPad X201s more) to select the CPU Core i7-640LM voltage lower, slower and Lithium-Ion 9-cell (more expensive 39 dollars (39 U.S. ), about 750,000 VND) compared with 6-cell battery). If using 6-cell battery, time can run a circuit of the EliteBook 2540p will be reduced to 11.5 hours.

Batteries of notebooks HP EliteBook 2540p and the Lenovo ThinkPad X201s only long been used in the first year, then they will be degradation and loss of maximum capacity.
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