Bests & Worsts Reviews from Amazon

Being an "emergency" device I was going to leave in my car and forget about I wanted to actually test it to make sure it was at least close to 30,000mAh. It didn't even charge my phone 3 times. I fully charged the battery and test it 2 times and both times it stopped charging my phone after the 3rd time. I have a Samsung S21 Ultra which has a 5,000mAh battery so this device doesn't even have 15,000mAh, or half the advertised capacity. So glad I tested it first. I'm sure many people just charge it and throw it in there car without testing or realizing.