![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://i.redd.it/i8cg8orl5ui31.jpg)
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.
![Found this fake 18650 picture elsewhere on reddit, figured I'd cross post here for awareness : r/electronic_cigarette Found this fake 18650 picture elsewhere on reddit, figured I'd cross post here for awareness : r/electronic_cigarette](https://external-preview.redd.it/7SWhEK-JJoq-auBv20D9NwTZwvrKJx9lqrXF8gLvraQ.jpg?auto=webp&s=9d2e366dc3f8c0556b22180b22220755bc4213b2)
Found this fake 18650 picture elsewhere on reddit, figured I'd cross post here for awareness : r/electronic_cigarette
![Energies | Free Full-Text | The Distribution and Detection Issues of Counterfeit Lithium-Ion Batteries Energies | Free Full-Text | The Distribution and Detection Issues of Counterfeit Lithium-Ion Batteries](https://www.mdpi.com/energies/energies-15-03798/article_deploy/html/images/energies-15-03798-g004.png)
Energies | Free Full-Text | The Distribution and Detection Issues of Counterfeit Lithium-Ion Batteries
![Tested cells, from left to right, UltraFire TR18650 4200 mAh, UltraFire... | Download Scientific Diagram Tested cells, from left to right, UltraFire TR18650 4200 mAh, UltraFire... | Download Scientific Diagram](https://www.researchgate.net/publication/277977002/figure/fig1/AS:613879365242926@1523371654943/Tested-cells-from-left-to-right-UltraFire-TR18650-4200-mAh-UltraFire-TR18650-4900-mAh.png)