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.
edit Recommended Dosage of ibuprofen and aspirin. The adult dose for ibuprofen is between 200mg and 800mg per dose, up to four times a day. A doctor should be consulted in the case of an overdose. The adult dose for aspirin is typically 325mg, which can be taken four times a day.