Battery systems according to embodiments of the present technology may include a battery. The battery may include a first electrode terminal and a second electrode terminal accessible along a first surface of the battery. The systems may include a module electrically coupled with the battery. The module may include a circuit board characterized by a first surface and a second surface opposite the first surface. The module may include a mold extending from the first surface of the circuit board toward the battery. The module may include a first conductive tab electrically coupling the module with the first electrode terminal. The module may include a second conductive tab electrically coupling the module with the second electrode terminal. The second conductive tab may extend across the mold substantially parallel to the first surface of the circuit board.