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.
different times for different people. If you do not have high blood pressure, or an allergy to aspirin you can take 800 mgs. of ibuprofen twice a day for 10 days..just as you would take an antibiotic 10 days to get rid of infection..the ibuprofen will get rid of an inflammation (pulled muscle)