Similar to other suggestions in that battery storage is needed, but the breakdown into the tree could really help the game.
Battery - Acid and the metal of your choice - Aluminum? Iron
Lithium battery - Lithium, Iron, plastic
Laptop - after consumer electronics - Electronics III, Lithium Battery, LED?
Battery Storage - Electronics IV, Construction III, Lithium batteries
Battery Vehicles - Recharge Station, Hydrogen Fuel Cell instead of Fuel station
Battery with tree expansion
New content
Power & Energy
Research & Tech
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