Battery Charger Rechargeable with Internal PCB 4 pcs Tenergy Li-Ion 18650 3.7V 2600 mAh

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Product Features and Technical Details

Product Features

• Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V.
• Higher energy density and lower weight than other types rechargeable batteries
• Dimensions: Diameter 18+/-0.2 mm, Height 66+/- 0.2mm
• Cycle Performance: 90% of initial capacity at 400 cycles, Cycle life: > 500 cycles
• Charge: Current = 0.5C mA Voltage = 4.2 V End Current = 0.01 mA, Discharge: Current = 0.5C mA End Voltage = 3.0V

Technical Details

• Model: 18650-2600-4

I bought these batteries for the Fenix TK 11 flashlight. They are really good batteries. The only downside is they take 12 hours to charge. With this particular flashlight the batteries last 2.5-3 hrs at the brightest setting. The charger allows you to charge two at a time which is nice. I recommend buying the 4 pack if you are a moderate user.