Charging

Many items in GT:NH require Electricity to work. Machines can be connected directly to power generators, but items must be charged in an appropriate GUI. Items will only charge in a machine that matches their desired power tier, which is usually the same tier of battery or circuit used to craft them if not listed. Virtually all GT Machines can charge by placing items in their power slot (center bottom, lightning bolt icon).

Battery Buffers can charge multiple items at once, not just batteries.