I took apart a Greenworks 40V battery Model 29662 (60-1758) 146Wh, date code 01/08/17. It has 20 x Sanyo UR18650RX U37A. Other numbers on each cell: "A UHL9RXD 123 27278 3626V".
This new battery died suddenly in a Greenworks 40V 8-Inch Cordless Pole Saw after only a few minutes of light use...