| General > General Technical Chat |
| Cheap eBay caps went bad (on the shelf!) |
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| rsjsouza:
It is a similar root cause of batteries that leak with absolutely no prior warning... Internal chemical instability that creates gas, buildup pressure and consequently rip their seams. |
| thm_w:
--- Quote from: floobydust on February 29, 2024, 06:57:02 pm ---These babies made hydrogen or some other gas, enough to pop apart, while just sitting there, electricity not required. Quite impressive. I have even new, unused Panasonics that leaked a little at the leads/bung. I thought low ESR electrolyte is water-based, also has high leakage current. --- End quote --- Yeah, I also had name brand SMD caps leak and go bad just sitting on the reel. Think it was Panasonic as well. But this was after ~10 years not 4 years. |
| Whales:
You see the datasheet specifies the shelf life as being lower than the service life 8) I suddenly want to start my own dodgy alcap brand. Maybe I'll design an automated assembly line that uses kitchen aluminium foil, thin paper (transparent single-ply commercial toilet paper?), hot glue as the bung, steel fence wire as the leads and sodium bicarbonate as the electrolyte. Not sure what to make the can out of yet. Any ideas to make this more fun? |
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