Onite Universal Cellphone Removeable Battery Charger, Extra 5V USB Output Port

Warnings:
1.This universal charger is suitable only for batteries with terminals on the top or bottom. It is not suitable for batteries with terminals on the front or back.
2.This universal charger is only fit the batteries with length between 42mm to 70mm(1.65"~2.75")
3.Please contact us for user manual docs or refer to the youtube to research "How to use onite universal battery charger"
How to use Onite Universal Battery Charger?"
1.Please take a look at your battery that you are going to be charging. There should be 2 contacts that are marked "positive" and "negative" as you can see here in this example.
2.Place your battery into the charger pushing down the slidable piece of the charger to fit the size of your battery.
3.Once the battery is in place, adjust the prongs of charger to match the positive and negative contacts of the battery. Please note that is the positive and negative are automatically recognized by the charger, it doesn't matter which prong connects the negative or positive.
4.So after the prongs of the charger and contacts of the battery are lined up. Pushing your battery in further so the charger's prongs contact the battery's terminals. And the light on the charger should turn on to blue, which means your battery is ready to be charged.
5.Finally, plug the charger into a power outlet. The light should turn to pink or purple which indicates that the battery is charging.
6.When the light turns to blue again, that indicate the battery is fully charged.