4.2v 18650 charger four slots li-ion battery usb independent charging portable electronic 10440 14500 16340 16650 14650 18350 18500 18650 uf

intelligent fast charging, durable full automatic sovercharge protection reverse connection protection independent charging the internal chip of the charger has the intelligent protection function that the battery is installed reversely and does not work. it can be charged normally again intelligent chip is used inside the charger to automatically control the voltage to prevent battery overcharge and better prolong battery life.syi