temperament format Uplifted 18650 battery vs aa battery size methane Attend Helmet
What's the difference between 18650, 21700, 30700, 4680 and other Li-ions
What kind of battery is this? (Blue). Thought it was just 1.2v Ni-cd, but upon measuring the voltage, it's at 3.9v. Same size as AA battery. : r/ batteries