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.
The maximum daily dose for ibuprofen is different for children and adults. The dose will depend on the symptoms being treated, but the maximum does not change. The maximum dose of prescription ibuprofen for adults, elderly adults and adolescents is 3200 mg. per day, divided into three or four doses.