EBL AAA Rechargeable Batteries 8Pcs 1100mAh and USB Input Smart Battery Charger for AA AAA Batteries Short Circuit & Input Voltage Detection/Protection. Individual charging status for each slot, can charge battery singly or in pairs 4 LEDs show the charging process.the LEDs display RED when put batteries into the charger;the LED light become weaker and weaker along with the charging process ;automatically switches to trickle charge when charging is complete to ensure maximum battery capacity Very safe products,good at shedding heat,automatically stop charging when voltage up to 3.4V Package:8pcs AAA 1100mAh batteries with storage case and 1pcs 4 bay individual battery charger