Anker PowerCore 20,000mAh PD 18W Powerbank

Had this portable charger for 3 years and 8 months. It held a charge well the first 3 years, the USB-C fast change seemed to work well but I could only get maybe 3 full charges before I had to recharge the pack. My old Anker seemed to last much longer and was able to charge more despite being smaller. Fast forward to early 2024 and I noticed the charger developed a bulge, it seemed to charge less efficiently and would get warm. A month later the bulge got bigger and caused the case to crack. At this point I stopped using it. It would lose its charge much faster and get warmer in that area. I recently decided to retire it but thought I would split the case to see if I could see the damage or maybe salvage it somehow. While peeling the corner of the case the cracked area started to smoke and quickly developed a glow. At this point I decided to place it in my sink and record this slow progression but it quickly bursted into 20” flames like you would see coming out of a blowtorch. It burned for about 15 seconds before I drowned it with my sink faucet. No serious damage was done (except to the portable charger), but it filled my house with smoke and my kitchen smells of electrical burning… I found out and wanted to warn people to not split the case! This could seriously hurt someone and easily result in a house, car, wildfire. I’m not sure if this would have happened if I left it alone as it was splitting and getting hotter over time. If you smell or see smoke treat it like a live grenade. Let it burn outside on the concrete or inside a metal container if possible. I’m not saying anything bad about this product or company but simply sharing my experience. I do have an Anker portable charger I bought about 6 years ago and still use to this day with no issues. Also, the portable charger was fully charged just before exploding.