SOAIY 1000mA Fast USB Powered AA AAA 18650 Battery Charger, Portable Battery Charger for A/AA/AAA Li-Ion NiMH Battery, Travel Battery Charger for 1.2V and 3.7V Rechargeable Battery [ADJUSTABLE SLOT AND WIDELY USED]- The 2 bay can be adjustable for different battery length.This battery charger is suitable for 3.7V Li-ion rechargeable batteries such as 26650/18650/18500/18350/17670/16340/14500/10440, and A/AA/AAA 1.2V Ni-MhNi-Cd rechargeable batteries. [CHARGE FAST]- Output 1000mA,This battery charger has built-in constant current and constant voltage charge modes, it can charge battery precisely and faster than normal charger. [Built-in Protection System]- There is many built-in protection systems , the battery will not be over-charged and over heat.So you will be worry-free while charging. [Automatically Identify Battery Type]- The battery charger can auto identify the battery type, it has different output voltage depends on different battery types, and charging current automatically allocated, in order to order to achieve the best charging effect. [Intelligent LED Indicator]- It has 3 LED indicate lights, allowing you to charge at a glance (30%--60%--100%). When fully charged, the three lights will stop flashing and stay on(NO beeping sound) .Individual Charging Status for Each Slot,Save time and energy.