The 3.7 Volt Lithium Ion / Lithium Polymer Battery Pack Smart Charger is an intelligent charger designed for all types of 3.7V Li-Ion Battery packs as well as Li-Polymer with a capacity of more than 700 mAh. This charger is built with an IC to cut off power automatically when the battery is fully charged, which ensures that your battery pack is charged safely and accurately.

The input of the charger supports multi-voltage AC power from 100V - 240V, with a rating frequency of 50/60Hz and a maximum input power of 6W. The output is DC4.2v 0.5A (500mAh), which is suitable for charging 3.7V Li-Ion and Li-Polymer battery packs. The connector type is a 4' 11" long 5.5 x 2.1 x 12mm male barrel connector, which includes one Connector Adapter from 5.5mm x 2.1mm female Barrel plug to Clips. The charger's  dimensions are 88mm (3.5") x 52mm (2") x 30mm (1.2"). The weight of the charger is 4.9 oz (139 g), making it easy to carry for RC air/car.

This smart charger is equipped with a red LED light that will show battery while charging, and a green LED light that shows when the battery is fully charged. The compact size and light-weight design make it ideal for use with RC air and car models. It includes Connector to Clips for easy connecting to any battery pack wire leads, and the clips can be removed for another connector of your choice.

The charge time of the charger is calculated using the formula: (Ah rate of the pack x 1.5) / 0.5A charge current. The UL-approved charger ensures that you can use this charger safely and without any worries. With its intelligent design and built-in safety features, this charger is an excellent choice for anyone looking to charge their 3.7V Li-Ion or Li-Polymer battery packs.