Many LED flashlights powered by CR123A batteries produce incredible brightness. However, CR123A batteries can be expensive and not that commonly available. Rechargeable CR123A batteries save money, trouble and the environment but their battery runtime is significantly shorter than their disposable counterparts. 18650 rechargeable is a new kind of battery that provides consistent brightness and battery runtime throughout its lifetime. It is compatible with many flashlights that use 2 CR123A batteries. Its battery runtime is 50% longer than disposable CR123A and three times of rechargeable CR123A ones.
This charger comes with two independent charging channels and adjustable compartments. You can safely charge two batteries of unequal discharge state or capacity at the same time as it independently monitors and controls the charge for each battery compartment. This is also a fast charger and it takes only 2-4 hours to completely recharge two batteries. When the battery is fully recharged, red indicator turns to green. Best of all, this rechargeable battery features a unique internal PBC protection to prevents over-charge or over-discharge, which prolongs the battery lifespan and reduces the risk of battery mishandling.
If you are on the road frequently, you should also consider to get the car adapter for the charger kit. This way you are always ready to go no matter where and when.
Features and Specifications
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Charges 3.6/3.7V lithium batteries: 18650, 14500, 17650 rechargeable batteries.
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Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V
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Nominal Voltage: Average 3.7V
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Cut-off Voltage: 2.5V
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Cycle Performance: 90% of initial capacity at 400 cycles
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Cycle life: > 500 cycles
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Charge time: 2-4 hours
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Charge: Current = 0.5C mA Voltage = 4.2 V End Current = 0.01 mA
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Discharge: Current = 0.5C mA End Voltage = 3.0V
Usage and Maintenance
To maximize the battery lifespan, please do not charge batteries over 16 hours.
Ultrafire 18650 Rechargeable kit 
