Using too much battery on iPhone 14 when running in the background

Yesterday night, I executed the command below to run iSH in the background:

```bash
cat /dev/location > /dev/null 2> /dev/null &
```

Then I slept.

I'm using ```iPhone 14```. I remembered, the battery of my iPhone is $64$% yesterday night. But when I woke up, **there is only $20$% battery.**

I also have an ```iPad``` (7th generation), and I also ran iSH on it in the background. But it only used $8$% battery through the whole night.

**Why does iSH use so much battery on iPhone 14? How to set a memory limit?**

Start by reproducing `cat /dev/location > /dev/null 2> /dev/null &` in iSH on an iPhone 14, then compare overnight battery and background behavior with the iPad 7th generation report. No files or tests are named; done means identifying the cause of the battery difference and determining whether a memory limit can be supported or documented.

Written by the indexing model from the issue text.