I didn't know either but I like the 3-hour relaxing music video that was recommended to them. After a few minutes of that I thought, "How bad could they be?"
1. Telegram chat bot from this rust crate: https://crates.io/crates/telegram-bot
2. Some web microservices that the chatbot communicates with
3. Pi hole adblocking.
This is all on one 3b+ with plenty of resources to spare.
>All battery claims depend on network configuration and many other factors; actual results will vary.
They may not be the only offenders but it bugs me that the tech specs don't tell you the battery capacity in mAH. Instead they give a relative number of hours and compare to previous phones. Those aren't tech specs, they're claims-- which they can say in fine print are unreliable.