Powertac Li-Ion 18650 Button-Top Rechargeable Battery (2600 mAh 3.7V)

Powertac Li-Ion 18650 Button-Top Rechargeable Battery (2600 mAh 3.7V)
Product Code: Powertac-18650
Availability: In Stock
Price: $9.95
   - OR -   

Features and Benefits
Unique and New! With PCB protection!  Button-top.
Li-Ion 18650 cylindrical rechargeable batteries with Internal Voltage protection PCB!
Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V.
Unique PCB design and patent pending.
3.7V 2600mAh high-capacity
High energy density and lower weight than other rechargeable batteries
Manufactured under ISO9001-2000 to assure quality
Battery tested based on International Electrotechnical Commission (IEC) standard to ensure capacity, quality,and life time.
Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V. 

Diameter 18+/-0.2 mm
Height 66+/- 0.2mm
Weight (Typical) Approx. 46 g yes
Nominal Voltage: Average 3.7V
Cut-off Voltage: 3.0V
Internal Impedance: less or equal to 180 milliohm (with PTC)
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
Max. Charging current: 1.5C ma
Max. Discharging current 1.5C ma (for continuous discharge)


Use only “Protected” lithium-ion batteries equipped with PCB (protection circuit board) or PCM (Protection Circuit Module).  All PowerTac-branded batteries have this protection circuit. “Unprotected” lithium-ion batteries are NOT recommended – never use – serious risk of personal injury or property damage may occur due to possible explosion.  Do not attempt to recharge disposable batteries such as a CR123A Li-ion commonly used in flashlights.

Use caution when working with Li-ion cells, they are very sensitive to charging characteristics and may explode or burn if mishandled.  Make sure the user has appropriate understanding of Li-ion rechargeable batteries (such as 18650, 18500, 26650, RCR123A) in charging, discharging and assembly before use.  DO NOT mix and match old and new, used and unused batteries; be sure Voltage and mAh ratings are the same.  PowerTac is not responsible for any personal or property damage caused by misuse or mishandling of Li-ion batteries and/or chargers. 

PowerTac Lifetime Warranty is NOT valid if third-party (non-PowerTac) branded batteries cause damage to the flashlight due to improper type used, misuse, leakage or explosion.  Consumer assumes all responsibility for proper battery installation and usage.

Use ONLY the recommended battery-type for your particular PowerTac flashlight.  Important – please do your research and make sure your battery is compatible. If you need help in selecting the proper battery or have general questions – please call us (919) 239-4470 or email: info@powertac.com.  We are here to help.  “Protected” Rechargeable Lithium-ion batteries are very reliable, long-lasting and safe if used and recharged in a proper manner.


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