system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do smart phone / laptop batteries still suck after all these years, and when can we expect an improvement?

My lovely new quad core phone runs out of juice so fast it's embarassing, even with the power saver option on :(

Is money the issue? Not enough research done?
gpt
We're increasing power storing abilities and efficiency, but we're also DRASTICALLY increasing power demands by increasing how useful these battery operated things are.

We're making huge progress, but computers are getting more powerful at a similar speed, which means even though batteries are better, they are powering things that require more power.

Batteries are also REALLY hard, this is why battery powered cars are only very recently becoming feasible (and with a lot of issues).  It's also why it's basically impossible to store power generated by things like power plants for any useful amount of time.