Specifications: Input: DC 5V /2A. Safety Protections: DV Protection; ODV Protection; Total Time Control; Highest Voltage Protection. Idling Output Voltage: 5V. Input current: Li-ion 2000MA*1 / 1000MA*2 / 500MA*3 / 500MA*4             NiMH 1.2V  500MA*1 / 500MA*2 / 500MA*3 / 500MA*4. Protection Mode: Short Circuit Protection; Over-Current Protection; Reverse Connection Protection  . Case Material: ABS +PC, fire proof material. Loading spring: Military grade spring. Working Temperature: 0-40 Celsius. UNIVERSAL CHARGING COMPATIBILITY - The premium S4 recharger can be applied to LiFePO4 IMR INR ICR10440/14500/14650/16340/17500/17670/18350/18490/18500/18650/18700/22650/25500/26650/32650 Batteries, A AA AAA AAAA C SC Batteries. SMART CHARGE WITH DIGITAL LCD DISPLAY - The built-in blue back light LCD panel can clearly displays charging parameters.It can show the charging process and Battery type, current, voltage, time, charging percentage, charging capacity, Auto alert indication can prevent damage to both batteries and charger. SAFE TO USE - Made from top-grade PC+ABS material.Features over-charger, short-circuit, over-current prevention to protect batteries.It can detect and regulate the internal temperature.It has excellently Anti-corrosion, Anti-oxidation and Durable performance that can provide long service time for you. PORTABLE & CONVENIENT SPEEDY CHARGER - It is handy size and convenient for you to carry and store anywhere.It can automatically detect battery status, select charge mode and cut off the power when full or overtime.Really easy and convenient for your daily use. LCD display and Operation: Connecting to power supply without loading batteries, the LCD screen will be bright for 2 seconds then displays “null” which means no batteries being loaded. Charging Status VS Screen Display: loading batteries, the screen displays channel /battery voltage / charging current / capacity rates.  “%” flashes while i2 device is charging, “%” increases until 100% which means batteries are fully charged, i2 cease charging. Button Operation: Click the button to check related information of batteries, including voltage / capacity / time. A long click can keep the screen constantly bright. Connecting to Power Supply, without batteries, the screen will be bright for 2 seconds then display “null” which denotes no batteries being loaded. Charging Status and Screen Display: loading batteries, the screen will display channel / battery type / battery voltage / charging current / capacity rate.  “%” flashes mean the device is charging, “%” increases until 100% which means batteries are fully charged, I4 cease charging the battery. Button Operation: 3-second long click to turn on or turn off the LCD display. A soft tap displays the batteries' charging status including voltage / capacity / time. Pakage Included: 1 x i4 LCD Battery Charger. 1 x USB Cable. 1 x User manul. 1 x Box. Tips This charger only works on rechargeable lithium-ion, Ni-mh and Ni-cd batteries, charging other types of batteries may damage the charger and/or batteries, causing unnecessary loss. This charger should be used inside or in vehicles, DO NOT use in rainy, snowy, high or low temperature environment, or exposed to direct sunlight.