Charging Gadgets adds one block, the Charging Station, which burns ordinary fuel like coal or wood to charge any item that uses Forge Energy (FE). One coal gives 20,000 RF and the internal buffer holds 1,000,000 RF.
It is meant as an early-game stopgap before you have a full power setup, and it never wastes fuel: burning stops once the capacitor is full. Available for Forge and NeoForge, Minecraft 1.15.2 - 26.1.2.
Add it to your Minecraft server with one click from the panel, and powered tools from other mods can be charged long before the first generator goes up.