Frequently asked questions
Everything you need to know about compatibility, quality, warranty and delivery — all in one place.
Questions?
We’ve got answers.
Everything you need to know about compatibility, quality and warranty. Can’t find your answer? Our team is a call away.
How to Calculate Laptop Battery Run Time
You can calculate your laptop battery life by dividing the battery capacity (Watt-hours or Whr) from the power consumption of your laptop (watts).
Calculate Battery Life
Watt Hours / Watts = Battery Life (in hours)
Example: 60 Whr / 20 Watts = 3 Hours
Calculate Watt-Hours
Whr = Volts x mAh / 1000
Example: 14.8 Volts x 4060mAh / 1000 = 60.09 Watt-Hours (rounded up)
Calculate Milli-Amp Hours
mAh = Whr x 1000 / Volts
Example: 60.09 x 1000 / 14.8 = 4060 mAH (rounded down)
Will a higher mAh battery rating negatively affect my laptop?
No. A battery with a higher mAh rating will not damage your laptop or power charger. It just means the battery will store more energy inside. We use only the highest rated lithium-ion laptop batteries.
Find the right battery for your laptop today
Share your laptop model or part number and our experts will match you with the perfect Teksus battery — genuine, warrantied and shipped fast.