Ryobi Drills - Recent Questions, Troubleshooting & Support
Ryobi 18V lithium battery won't charge
Hi, Thanks for getting back to me. The yellow and blinking red indicate a defective cell. Since it has lithium cells and is that new any repair to it would be a waste of your time. Ryobi tools purchased in 2008 have a 2 year warranty. I am guessing you probably got it at a home depot and you should return it under the warranty. All new Ryobi tools have a three year warranty. Good Luck! and Thanks for using fixya!
How to fix lithium battery got wet
The battery cells inside lithium ion batteries (and other types of batteries) tend to corrode if they become wet for a given period of time. They need to be dried out immediately to avoid corrosion. Unfortunately, it seems like it is too late to dry out yours. Your battery will need to be carefully disassembled using procedures on fixya and the corroded cells replaced with similar quality cells. The cells in Ryobi batteries are spotted welded in place and these welds need to be broken carefully using a Stanley knife. Replace the cell(s) with new ones or from other disassembled batteries and solder them in place. Check for cell voltage imbalance (see other solutions on fixya) and reassemble. Good quality Panasonic Li Ion cells can be purchased for about $4 each on ebay. If you go this route, I would recommend replacing all cells, not just the corroded ones.
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