The claimed Panasonic Toughbook 31 operation time is up to 18 hours without recharging with a standard battery or up to 27 hours with an additional battery, Dell claims that the XPS 13 can work up to 15 hours, and the Lenovo X250 with two batteries
lasted 21 hours in web surfing and 18 hours - when playing streaming video. Improving the energy efficiency of component notebooks allows you to get closer to the day of work without recharging.

On Monday, Panasonic unveiled the updated
Toughbook 31 business and research notebook. The laptop is based on the Intel® Core ™ i5-5300U vPro ™ processor and runs on the Windows 8.1 Pro operating system. The claimed device operation time is up to 18 hours, depending on the mode of use, and the addition of an additional battery will extend it to 27 hours. The weight of the 13.1 inch laptop is 3.58 kg, the additional battery will weight it to 3.7 kg. The price in the USA starts from 3699 dollars.
By the time the new Panasoni laptop was able to beat two previous records from Dell and Lenovo. Dell XPS 13 is able to work 12 hours on the main battery and up to 18.5 hours with the support of an additional battery. In this case, the price of a laptop is from $ 800, the second battery - another $ 108.
')
Lenovo Thinkpad X250 lasted even longer: almost 19 hours in video testing mode and 21 and a half hours of web surfing. The claimed laptop time is 20 hours. The price of the device starts from 1150 dollars.
The Wall Street Journal test.
The duration of the laptop depends on the applications you use. Watching videos and games requires more power than surfing the web or working in Word. Panasonic says that for 18 hours the laptop will work in power saving mode, with Wi-Fi turned off and the display brightness diminished - not a common type of using such a gadget.
Work is affected by improvements in storage, memory and processors. SSDs use energy more efficiently than regular
hard drives . All three mentioned laptops work on the latest Intel Core processors built on
Broadwell microarchitecture, which are more energy efficient than their predecessors. New chips produce the latest 14-nanometer process technology, they are 37% less than comparable chips on Haswell.
One of Intel’s main competitors, AMD,
aims to increase the energy efficiency of its processors by a factor of 25 over five years, which can mean up to 50 hours of battery life in an energy-saving mode.
But at the moment, 15 hours of work is the exception rather than the rule.

Panasonic Toughbook 31

Dell xps 13

Lenovo ThinkPad X250
