... Used 4*18650 battery pack *Using a CREE XM-L T6 LED and two XP-E R2 LED *Elastic deck, ... 6.1V vltage, said in the following, the battery will have no electricity in time, please charge ... , anodic oxidation surface treatment.6. Used 4*18650 battery pack, capacity: 4400mAh, voltage:8.4V, work ... in safe place B. Do not remove the battery, wiil affect the prodcuts performance and dangerous. Pictures ...