The Eagletac 2600mAh 18650 battery is designed for high-capacity and high-voltage underload, which adds longevity and power to any system. To charge it, add the Xtar MC1 Plus to the package. It’s a simple charger designed to output a safe 1A maximum constant current, and it can charge both the 18650 as well as other lithium-ion batteries—and at twice the amperage as the original MC1, no less. It’s also capable of detecting the battery being charged and will select the most appropriate current at either 0.5A or 1A.