The Bloog® MaxxFusion 65 mm electronic cigarette battery is a terrific, compact, long lasting e-cigarette battery that gets that second glance when you're out and about. Bloog® MaxxFusion electronic cigarette batteries should be used in conjunction with Bloog e-cigarette cartomizer tips. This KR808D-1 battery features a blue or red LED end that glows when inhaling. The battery is compatible with all Bloog Maxx Fusion threaded electronic cigarette cartomizers and is also compatible with all Bloog Maxx Fusion e-cigarette charging devices and is fully rechargeable.