These are perfect for nearly all rechargeable battery sizes, up to and including flat top 21700 cells. Both button top and flat top batteries can be charged and with Over Charge Protection, you don't need to worry about this unit damaging your expensive rechargeable batteries!
This unit can be connected via Micro USB cable (included) to any type of USB charging blocks like those you use for your cell phone or other USB charging devices.
These smart chargers will automatically identify the battery type within a few moments of inserting a battery.
These chargers can also repair over-discharged batteries. A 0V Activation Function brings them back to life. When charging batteries, this charger will increase the output current slowly to protect the batteries and increase battery life span.
