Bought the C930 about mid December. Haven't used it much. Not certain but it seems worse after the battery … Item Description: Brand: LENOVO Model: L17D2P31 Capacity:4650mAh,35.8WH Battery Life. Lenovo has fitted a 60 Wh battery into the thin and light Yoga C930, which is a good-sized battery for a notebook such as this. ... so the addition of a second screen doesn’t appear to impact the Yoga Book C930’s battery life in any major … This package provides Lenovo Battery Firmware Update and is supported on YOGA C930-13IKB, YOGA C930-13IKB Glass and running the following Operating Systems: Windows 10 (32-bit, 64-bit) The Lenovo Yoga Book C930 is very slim and light, but it comes at a cost. I was listening to music. Nothing connected to any of the USB ports. Item title： New Genuine L17D2P31 4650mAH Battery F LENOVO YB-J912F YB-J912L Yoga Book C930. High quality Battery For LENOVO Yoga C930-13IKB 81C4 Laptop computer, get LENOVO Yoga C930-13IKB 81C4 Laptop Battery from replacement-laptop-battery.com, All notebook batteries for LENOVO Yoga C930 … The only thing running was my BlueTooth headphones but the battery was aready draining before that. Updates had already been recently installed.