20700 and 21700 batteries

The 20700 and 21,700 battery types are here to stay. These new battery types are only slightly larger than the popular 18650 battery. The capacity of the 20,700 batteries is about one and a half times and 21,700 is about double 18,650.

Both battery types are 5mm 18650 batteries longer and 20700 diameter 1mm 18650 batteries larger, 21700, respectively, 2mm larger.