Battery systems according to embodiments of the present technology may include a battery including a first electrode terminal and a second electrode terminal accessible along a first surface of the battery. The battery systems may also include a module electrically coupled with the battery. The module may include a first mold extending toward the battery. The first mold may define a recess along a first surface of the first mold proximate the first electrode terminal and the second electrode terminal. The module may include a first conductive tab electrically coupling the module with the first electrode terminal. The first electrode terminal may be at least partially positioned within a space defined by the recess defined by the first mold. The module may also include a second conductive tab electrically coupling the module with the second electrode terminal.