![What are those brown spots? They just came after I already vaped over the half of the cartridge? : r/oilpen What are those brown spots? They just came after I already vaped over the half of the cartridge? : r/oilpen](https://preview.redd.it/4er2iu4dddz71.jpg?auto=webp&s=e70758d28006d3c572d9482f9291f89cfde15b8c)
What are those brown spots? They just came after I already vaped over the half of the cartridge? : r/oilpen
![Quick question for more knowledgeable people is this battery bad? Found my vape (used very little) while cleaning and the one battery (shown below) has dark spots and small bumps. The ends Quick question for more knowledgeable people is this battery bad? Found my vape (used very little) while cleaning and the one battery (shown below) has dark spots and small bumps. The ends](https://preview.redd.it/4965a4tf0or61.jpg?auto=webp&s=ae9941829ccdb0f906c21ca511155815dcd996cc)
Quick question for more knowledgeable people is this battery bad? Found my vape (used very little) while cleaning and the one battery (shown below) has dark spots and small bumps. The ends
![Is this battery still safe to use? It has this dark spot all around the bottom : r/electronic_cigarette Is this battery still safe to use? It has this dark spot all around the bottom : r/electronic_cigarette](https://imgur.com/kSWjo0R.jpg)