The GS-21 and GS-52 are 9 volt alkaline battery packs. New brand name cells are first

tab-welded together and then entirely encapsulated in non-hazardous epoxy. The potting

material is added through a portion-controlled pouring process and totally covers the

bottom, top, sides, and spaces between the individual cells, virtually eliminating

failure-causing air bubbles. All batteries must meet our rigid quality control

standards. They are hand inspected for air bubbles in the poured potting

material. Finished batteries must pass through a size gauge measuring

width, height and depth. They are further tested for proper

voltage and visually inspected by the QC department.