18650 To 21700 Battery Adapter For Astrolux FT01 / FT02 / FT03 LED Flashlight DIY 18650 Adaptor Holder

Brand: Astrolux Product Name: 18650 Battery Adapter For: 18650 To 21700 battery adapter For: Astrolux FT01 / FT02 / FT03 (For Astrolux FT01 / FT02, if you just have 18650 battery can use it. The FT03 itself can fit the 18650 battery, but it is easier to align the ends of the battery with the spring when use this adapter.)