The i4 is an upgraded version of our smart charger S4. It not only inherits the clear readings of the high-definition LCD display and the durable loading spring, but also uses a USB power interface to charge cylindrical rechargeable batteries with a length of 32-70mm.

The i4 has two core components: an efficient switching power supply and a microprocessor. The two components convert the high voltage into a voltage suitable for battery charging. This circuit adopts four independent output charging modes, which can charge lithium-ion batteries, nickel-metal-hydride batteries and nickel-cadmium batteries of any model and capacity. The current is in a constant mode and can be automatically distributed to four channels.

We will introduce more feature details below.