I would say it's time for a new drill, or get something like https://www.amazon.com/Topbatt-2Packs-Replacement-Battery-Cordless/dp/B01NCMVX0N/ref=sr_1_5?s=power-hand-tools&ie=UTF8&qid=1504986878&sr=1-5&keywords=Dewalt+18v+battery But I don't see the appeal of getting whats in your 2nd and 3rd link, when the 2nd seems like it would be just as well on its own