2x Nitecore NL1835 3500mAh 18650 -3.6V Protected Lithium Ion Button Top Battery w/Eco-Sensa Battery Case;

Nitecore NL1835 3500mAh 18650 -3.7V Protected Lithium Ion Button Top Battery

PCB Intelligent protection circuit
Battery Type: 18650
Chemistry: Lithium Ion (Li-ion)
Voltage: 3.6V
Capacity: 3500mAh
Max Charging Current: 2A
Recommended Charging Current: 1A
Estimated Charge Cycles: 500 Cycles
Max Discharge Current: 4A
Diameter: 18.5mm
Height: 69.7mm
Weight: 50g