Torches on 18650 batteries

18650

— the most common size of replaceable batteries today is cylindrical, with a voltage of 3.7 V. Such batteries are marked with 5 numbers, of which the first two indicate the diameter, and the second indicate the length (in millimetres). Accordingly, the 18650 elements have a diameter of 18 mm and a length of 65 mm.

Such batteries owe their popularity to a combination, on the one hand, of power and high capacity, on the other hand, to a relatively small size. In addition, the plug-in design and standard size offer a range of additional benefits. So, the search and purchase of such elements does not cause difficulties; a dead set of batteries can be quickly replaced with a fresh one and continue using the flashlight; and if there is a charger and a power source nearby, then one of the kits can even be charged while the other one is being used.

Note that such power supplies are not necessarily included in the package (although this option is also quite popular). It's also worth bearing in mind that 18650 cells come under different brands and can vary markedly in terms of capacity and overall quality. However, this moment can also be attributed to the advantages: it allows you to choose the battery at your discretion, depending on your needs and low-cost.