Many assume bigger batteries always last longer—but efficiency, screen brightness, and software drain power too A 50wh battery can outperform a 70wh one if optimized. Watt hours are a measure of power over time and is a measure of capacity If the laptop is pulling 56w it would last an hour If it's pulling 5.6w it would last 10 The amount of power drawn.
It has a 48whr battery and based on my testing it only lasted 3.5 hours with normal usage, basically surfing the web and watching some videos A 56whr battery has roughly 17% more capacity than a 48whr battery If the acer nitor 5 had a 56whr battery, then it would last a little over 4 hours. 100wh divided by 15 and 10 watts gives us 7 to 10 hours respectively The result specifies how long your laptop should last, though it may be a tad. The experts at laptop battery express explain how to calculate your laptop battery life and run time.
Use the standard voltage for laptops, often around 10v Runtime = capacity / (power consumption / voltage).
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