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Sunwayman AP-18 18650 3400mAh 3.7V Protected Lithium Ion (Li-Ion) Button Top Battery - Clam Shell

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SUNWAYMAN 18650 3400 mAh 3.7V Li-Ion Battery

Powerful and Protected

The SUNWAYMAN 18650 Lithium Ion Battery is the brand's first ever rechargeable battery, although you wouldn't think it based on its sophistication. This potent Li-Ion cell delivers a sizable 3.7 Volts of power and sports an impressive capacity of 3400 mAh, providing all the energy needed to power your high performance devices. Safety is as much a key feature of the battery as power, featuring PTC Overcurrent Protection as well as a specialized pressure relief valve to prevent damage from sudden temperature increase. The 18650 is capable of being recharged up to 500 times before dropping to 80 percent of its initial capacity, allowing for extensive use before needing replacing. The perfect companion to your SUNWAYMAN LED flashlight, this 18650 battery is a must have!


  • Button top made of gold-plated copper for superior conductivity and heat resistance
  • PTC Overcurrent Protection prevents over-discharge that could damage the battery and its device
  • Pressure relief valve on negative end activates if there is a sudden temperature increase
  • Certifications: RoHS, CE, PICC


  • Battery Size: 18650
  • Battery Chemistry: Lithium-Ion
  • Nominal Voltage: 3.7V
  • Nominal Capacity: 3400 mAh
  • Operating Temperature: -20°C to 60°C (-4°F to 140°F)
  • Estimated Charge Cycles: 500 cycles
  • Dimensions:
    • Length - 2.72" (69 mm)
    • Diameter - 0.72" (18.4 mm)
  • Weight: 1.67 oz. (47.6 g)
Battery Size:18650
Battery Capacity (mAh):3400
Battery Chemistry:Li-Ion
Battery Voltage:3.7
Battery Terminal Type:Button Top
Battery Shelf Life:3 Years
Product Certifications:CE, RoHS
Packaging:Clam Shell
Warranty:Battery Junction 30-Day Warranty
Return Policy:Battery Junction Return Policy
Product Weight:1.679oz
Product Dimensions:2.717" (L) x 0.724" (Diameter)
Country of Origin:CN
Associated Battery Sizes:168A, 18650, 19670, Protected 18650, Unprotected 18650
2 Reviews
100% (2)
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By Larry
Arvada, CO
Functional 1850 Battery
January 7, 2020
I got a Sunwayman AP-18 18650 battery and it appears to be well made and without visible defects. I have recharged it several times without problems and the size is compatible with all of my flashlights that take 18650's. I haven't measured the run time, but it has powered a flashlight, that is used frequently, for weeks, keeping it bright. So far, this seems to be a functional battery.
By David W.
Best I've tried.
December 17, 2019
These are the best 18650s yet.
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Sunwayman AP-18 18650 3400mAh 3.7V Protected Lithium Ion (Li-Ion) Button Top Battery - Clam Shell

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