BatBox 40,000 EU (LV) · 
CESU 300,000 (MV) · 
MFE 4M (HV) · 
MFSU 40M (EV).
The front (dots) outputs power, the other 5 sides accept it. The top slot charges tools, the bottom slot drains batteries.
Crafting Table3 × 3
+
+
+++1 × BatBox
Crafting Table3 × 3
1 × CESU
Crafting Table3 × 3
1 × MFE
Crafting Table3 × 3
1 × MFSUWrench or 
Electric Wrench: right-click turns the front, sneaking dismantles (energy stays in the item).
Transformers convert one tier: high side at the front, low tier on 5 sides. Redstone = step up.
Crafting Table3 × 3
+++
+++1 × LV Transformer
Crafting Table3 × 3
1 × MV Transformer
Crafting Table3 × 3
1 × HV TransformerRequired materials
Crafting Table3 × 3
1 × EV TransformerRedstone button in the storage window (like IC2): always · redstone stops output · only with redstone · no output unless full (overflow — storage stays full, only the rest flows on) · emit redstone if full / charged / empty (e.g. switch generators off when the BatBox is full).
The window on the side shows the charge: 0–4 bars, full = orange-red. Broken with a pickaxe, storage keeps only 80 % — with a wrench everything.
Crafting Table3 × 3
+++++1 × BatBox
Crafting Table3 × 3
1 × Charge Pad (BatBox)