How many AA batteries does it take to charge a pair of wireless earbuds and their case?
About 2 AA batteriesEarbuds plus their case hold about 3.3 Wh, and one AA holds about 3 Wh.
It takes about 2 AA batteries.
How we worked it out
Earbuds plus their case hold about 3.3 Wh, and one AA holds about 3 Wh. Alkaline AA batteries, about 3 Wh each, and no energy lost on the way. Real life adds a little friction and waste, so treat the number as a solid ballpark rather than a lab result. The constants behind every experiment are on the science page.
Watch it happen
This was one of the five experiments in It Took #31. In the game you guess first, then the experiment plays out with your number: too few and it fails, too many and it overshoots.
Play It Took #31Play today’s experiments
More aa batteries questions
- How many AA batteries does it take to play a Nintendo Switch on the TV for an hour? About 2.
- How many AA batteries does it take to charge an action camera battery? About 3.
- How many AA batteries does it take to run a blender for one minute? About 3.
- How many AA batteries does it take to fully charge a smartphone? About 5.
- How many AA batteries does it take to charge a small camera drone’s battery? About 7.
- How many AA batteries does it take to charge an iPad mini? About 7.
- How many AA batteries does it take to make one cup of tea? About 8.
- How many AA batteries does it take to toast a slice of bread? About 11.