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watts - What is the valid capacity ranges of Lithium Ion 18650 batteries? - Electrical Engineering Stack Exchange
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UltraFire 18650 original 3.7V 3600mAh rechargeable lithium ion battery high quality lithium lantern gift for flashlight toys|battery for|battery for flashlightbrc 18650 - AliExpress
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![Opened up a fake Ultrafire 18650. Expecting the normal smaller battery with paper wad. Not exactly sure what I am looking at. It looks like a rolled battery. Started to catch fire. Opened up a fake Ultrafire 18650. Expecting the normal smaller battery with paper wad. Not exactly sure what I am looking at. It looks like a rolled battery. Started to catch fire.](https://preview.redd.it/i8cg8orl5ui31.jpg?width=640&crop=smart&auto=webp&s=ec95e080d139f1b5b716bf1ccf1c04af8dd4ecc1)
Opened up a fake Ultrafire 18650. Expecting the normal smaller battery with paper wad. Not exactly sure what I am looking at. It looks like a rolled battery. Started to catch fire.
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