There's an outdoor area I'm working on, and I want to build a small station where people can charge their phones. There's no access to house power in the area. I've looked into solar chargers, but they seem impractical, so I was thinking something like a car battery or other large battery might work.
Is that the best way to do this? I need something that can be removed and charged, and then hooked up to a USB port. Thanks for any help!