uxcell 50Pcs CR1620 Battery Negative To Positive Conversion Spring Contact Nickeling Plate 16mmx3mm

you'll need these items they're listed below eat your soldering iron to 800 to 850 degrees make sure to use a wide tip 3/16 5 millimeter so ins with sandpaper you clean the ends of the cells apply flocks you thoroughly ten the soldering iron tip you apply the solder quickly if you linger too long you may damage the cells you arrange the cells make sure they go positive the negative apply medium viscosity superglue you don't have to do it this way but this method works really well for me apply accelerator to we cured the glue repeat the process on the opposite side cut 1 inch tabbing strips you secure the battery pack you placed tabbing between cells remember go positive to negative if your battery is going to be arranged in series thoroughly ten the soldering iron tip hold tabbing in place with the popsicle stick apply the iron ensure the solder flows thoroughly as shown repeat the proc