I purchased nearly a full set of 19.2 cordless tools over 10 years ago and have been very satisfied untill 3or4 years ago when I had to replace worn out batteries. I have 4 NiCd's I purchased 4/12 that won't hold a shelf charge for much over 2 weeks. I have 2 lithium-Ion batteries that came with tools that have been problematic since they were new. I went back to the store and was told I wasn't charging the properly. I have a good set of tools but cannot use them because I have no way to power them. I am about ready to retire them to the trash. Any better suggestions.