I was struggling with battery life on my ThinkPad T460s, and recently discovered this tool. AMAZING! It for sure did improve battery life alot! : r/thinkpad
NeweggBusiness - Lenovo ThinkPad T460s and T470s Battery (Front)
X240 Battery Polymer for Lenovo ThinkPad T460 T460P T550 T560 45N1126 45N1125 US | eBay