This mod combines well with the stargate ring mod that can teleport entities.
https://mods.factorio.com/mod/transport-ring-teleporter
Using both and some prior prep, one can teleport a fully charged legendary or huge modded accumulator to a location to charge up local accumulators.
highly useful for emergency power, as long as the rings are charged before the power problem occurs.
make sure power to the platform is disconnected/ set to low priority on the low power base till the power issue is resolved.
Thank you.