... maintain 8 hours for 300 lumen. • Power: Use 4 cell of 18650 battery, each two batteries was design in parallel.The ... on, suit for Family standing.CautionIf the battery didn't use for along time, the battery will discharge automatically, in case of ... a battery indicator light, when blue means normal status, red means low battery, red flashing means short of battery, tips charge. LED head lamp or led ...