Flat Top 18650 Li-Ion Battery without Protection (3.7V) - BIS Certified Line Tracking other brands may have reverse

other brands may have reverse polarity and can destroy your battery

The keys are connected into a matrix

the light goes out

Provision to add standard servo motors (sold separately)

5 m (5 ft) Packaging 1 roll

Flat Top 18650 Li-Ion Battery without Protection (3.7V) - BIS Certified Line Tracking other brands may have reverseThese lithium ion batteries come in a variety of configurations and capacities. The battery with a protection circuit provides over voltage, under voltage, and over current protection. Yet, it is slim and easy to fit into many project cases with a battery size of 18mm*65mm These batteries do not come with protection circuitry. It is very important that you only use a LiIon LiPoly constant voltage constant current charger to recharge them and at a rate