Hai im using ASUS X550C laptop since 3 years, this power capacity is 19 volts, 3.42 amphs, 65 watts, windows8, nice to working in this laptop, also battery life 6 to 8 hours, and easy to use, this device cost also reasonable, sonce 3 years there is no problems in this laptop, keyboard buttons is very flexible.
the ASUS laptop is convenient use for our work, but in this laptop one drawback is there that is, after 2, 3 years starting problem is there, some times applications hanging problem is there otherwise this laptop is too good.