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.
Â· just now. Report Abuse. Each person is different and for me it takes less than 15 min's for ibuprofen to work in MY body but I know that ibuprofen has a half life of 2 hours, so it will be working it's best in 2 hours but you should feel it working in 30 min's to 1 hour.