If you are interested in an action camera with the longest battery life, you're on the right page. Here we have sorted all the action cameras, over 150+ at the time of writing by how long their batteries last.
Whatever you need a longer battery life for, you can use this list to help you work out what would work for you. Like other small electronics, battery life suffers because the cameras are so small and only so much space can be made for the battery.
There are also other things you can do to extend the battery life of your action camera, one of those is to connect an external power supply or battery bank to your camera, if it will let it. The good things is, we have categorised all action cameras that have this feature and you can search for this here, this also includes filtering by action cameras which you can remove their batteries.
If you already own an action camera and don't know whether you can record whilst plugged in to an external power supply. Check if you have the loop and dashcam mode, also known as car mode on some cameras. This means you can plug in to the 12v cigarette lighter or USB sockets in your car and keep the action camera recording continuously whilst on your cars dash.
This doesn't mean you are limited to that mode, but it does mean that you can use other shooting modes, time lapse, video recording, etc and plug in a power bank or other battery extender.
There you have it, a simple introduction to action cameras with the longest battery life.