
http://shop.eten.hu/mugen-power-2133-78 ... p-514.html
Ok the 6cell battery you get with HP is a 55watt, the Mugen is 78watt.
The 6cell gets 7hours 19 minutes according to laptopmag.com
7 hours and 19 minutes is a total of 439 minutes
439 divided by 55 is 7.98
7.98 times 78 is 623
623 minutes is 10 hours and 39 minutes
So. In Theory the 9cell Mugen battery will make the 2140 last 10 hours and 39 minutes.
PS: I feel so smart thinking that up <3
