These rechargeable batteries use lithium-ion polymer cells, and changes the voltage of 3.7V to the constant output voltage of 1.5 V through voltage conversion technology. It completely replaces the disposable alkaline batteries and nickel-metal hydride batteries. Meanwhile, the stable output voltage of 1.5V of universal lithium batteries solves the problem that some electric appliances are unable to work because NI-MH rechargeable batteries’ voltage is too low (1.2V). Lithium batteries will NOT leak fluid like other types of batteries.
Batteries will come fully charged so just put them straight into your device.
These batteries will last twice as long as other batteries before needing to be recharged.
A battery charger also comes with this package. You need to recharge the batteries in the Kentli battery charger supplied.
Connect the charger to a USB port 5v-500-2000Ma, Apple preferred.
Batteries will start of red then go green after a couple of hours(give the batteries a slight twist when in the charger to get a good connection at either end of the battery). Please note that Lithium batteries may not work in some devices.