This advance civilization would probably be still using lead acid or alkaline since there is no incentive to do so. They would even be surprised at us putting literal explosives (lithium) in our devices.
They could also have wireless power or just very good tiny generators.
Why use a battery when you can just have tiny fusion reactors in every house/ship that broadcasts power for all your needs.
Like them pylons in star craft
Rhynoplaz@lemmy.world 2 weeks ago
Reminds me of Fallout and how they have more advanced technology in some fields, but are extremely retro in others because they focused on nuclear energy instead of microprocessors.