Use electronics solder that contains 2% silver. One side of the cell is (+), the other (-). Cells are connected in various combinations of series and parallel, depending on the intended use--our broken panels are made to be connected with 3 or 4 panels in series to charge 12 volt batteries.
This means that extra pain  medication can harm your kidneys and/or your liver, without any  extra pain relief.    400mg of ibuprofen (2 normal tabs, or 1 extra strength tab) every  4-6 hours, and up to 1000 mg of acetaminophen (2 extra strength  tabs) are the upper recommended dose for both drugs.
Over-the-counter ibuprofen tablets contain 200 mg of medication, and this is generally safe to take up to three times per day. Higher doses can be prescribed if necessary but may increase your risk of side effects. The maximum daily dose for an adult is usually considered to be 800 mg three times per day.