This Power Battery Flask Version 3 holds 2x20700 batteries.

It is comfortable to carry around in your pocket, easy to use, stylish.

The lid and flask print together for simplicity purposes, the power symbol on the front is simply for aesthetics and usually prints just fine on the recommended settings. Arrow Notches were added on the side of the lid to give you a firm grip and also show you where to squeeze to open the case. No magnets or installation necessary, the lid and case friction fit together with a ball bearing style lock.

Can also hold two AA or three AAA batteries if need be.