Overcurrent protection; overcharge protection; undervoltage protection; light-load protection; overload; short circuit protection Reverse battery protection (reverse an arbitrary, one and two batteries will not be mobile power boxes, battery causing any damage) Over-discharge battery repair Two-color battery segment indication; charging indicator; fully charged indication Plug and play, no need to repeatedly switch the tedious Charging cut-off voltage of 4.2V Discharge cut-off voltage 3V Energy conversion efficiency of 85% Precision tight fit sleeve design, superior feel Battery holder card bit design to ensure reliable contact with Copper pillars, increasing the battery contacts effect, reducing the on-resistance The built-in utility small flashlight, method of use : click the switch > light > weak flash ; long by 3 seconds to start the SOS mode. Shell thickening up to 2.5mm, increasing product reliability outdoor activities Support the battery with protection board Warm reminding: Suggestions on the selection of authentic enough capacity of 18650 batteries, do not use AAA batteries. Avoid placing a wet place to store. Not for use in water. Not suitable for children to use alone, when children using it need by adult help or care. Package included: 1 x Battery Box Shell ( batteries is not included in your packaged) 1 x User Guide.
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