![Charging time of recharge-able battery (TR 18650 8000mAh 3.7V) - Electrical Engineering Stack Exchange Charging time of recharge-able battery (TR 18650 8000mAh 3.7V) - Electrical Engineering Stack Exchange](https://i.imgur.com/Skj4MhD.jpg)
Charging time of recharge-able battery (TR 18650 8000mAh 3.7V) - Electrical Engineering Stack Exchange
![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.
![Have you seen this type of counterfeit 18650 battery before? UltraFire - Rechargeable Batteries - BudgetLightForum.com Have you seen this type of counterfeit 18650 battery before? UltraFire - Rechargeable Batteries - BudgetLightForum.com](http://i.imgur.com/duMlI.jpg)
Have you seen this type of counterfeit 18650 battery before? UltraFire - Rechargeable Batteries - BudgetLightForum.com
![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://pub.mdpi-res.com/energies/energies-15-03798/article_deploy/html/images/energies-15-03798-g004.png?1653360988)
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 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-g003.png)