A:AnswerThis is the replacement AC adapter for the ThinkPad T550 laptop: https://adapterfamily.com/index.php?id_product=39759&controller=product&id_lang=1
A:AnswerNo, here is a link to the proper USB-c charger for the Yoga 720: https://www.cdw.com/shop/products/Lenovo-USB-C-45W-AC-Adapter-power-adapter-45-Watt/4673658.aspx?cm_cat=GoogleBase&cm_ite=4673658&cm_pla=NA-NA-LVO_AP&cm_ven=acquirgy&ef_id=WXZmIAAABHXpXH8L:20170815175025:s&gclid=EAIaIQobChMIwIzl--XZ1QIVhYFpCh0Wiw79EAQYBCABEgI2U_D_BwE&s_kwcid=AL!4223!3!198536934947!!!g!326658914865!
A:AnswerThis is the proper replacement AC adapter for the Lenovo U31-70: https://adapterfamily.com/index.php?id_product=39947&controller=product&id_lang=1
A:AnswerHere is the replacement AC adapter for the Yoga 2-13: http://www.battdepot.com/us/model/notebook+adapter/lenovo/yoga+2+13+59429098/ac20v90-slim.aspx
A:AnswerThe replacement adapter for the ThinkPad E450 is a 45W adapter. Here is the link to the proper adapter: http://www.chargers-pc.com/lenovo-ac-adapters-c-122_74/original-45w-ac-adapter-charger-lenovo-thinkpad-e450-20dc003qus-cord-p-116862.html
A:AnswerYes, there is the proper replacement charger for the Lenovo Yoga 700-11: http://www.chargerbuy.com/lenovo-yoga-700-multimode-charger.html?gclid=COLgke648tQCFZG6wAodvqINLA
A:AnswerNot sure. I have a Yoga 2, 13 in. And so far it's been working fine with that. But before I bought it, I made sure all the specs were the same as the one I was replacing.