Latitude E5530 Randomly Crashes When Not Plugged In

I've had my laptop for just barely a year now, but this problem has been going on for a few months now and I haven't been able to find a way to fix it.

When the laptop isn't plugged in it will randomly shut down. Just a black screen and I have to reboot everything. This usually happens if the laptop is moved slightly. But I can never consistently recreate it, it just happens.

It used to happen once a week or so and progressively has gotten worse to where if it's not plugged in I can almost guarantee it will do it at least once, if not multiple times in the same day.

I've tried seeing if there's some connectivity issues with the battery, but don't notice anything right away. Has anyone else experienced this? And is there anything I can do?