I purchased the T440s a couple years ago and so far its performance and battery life has been disappointing. On a full charge, it indicates about 3 hours (Lenovo Battery software). This is with a 22WHr external battery with less than 100 cycle out. Both batteries (including the internal one) are in good condition. I do mostly word processing and listen to music on youtube/spotify. The battery dies very quickly. What gives? I thought the S model supposed to be a trade off for better battery life at the expense of performance. But this POS does neither. Anyone experiencing this problem? Would an upgrade to an SSD help?