It is about charge cycles and heat. One of the things I like about EGO equipment is that the battery cells within the battery pack are encased in a phase changing substance that absorbes the heat out of the cells as it melts (undergoes phase change) from solid to liquid so the battery cells are...
Wow, the new 100 ah cells are monsters compared to the little baby 75 ah cells! Using my bathroom scale the old 75 ah cells are 50 lbs. each, so 200 lbs for the whole pack... the new 100 ah cells had a shipping weight of 76 lbs, call it 75 lbs without the packing material and you get 300 lbs...
I found my problem, either when I pulled the battery tray out, or slid it in after individually charging each cell I snagged one of the cables that goes above the battery pack and un-plugged it. After plugging that in the mower worked and mowed!!!
But it still had pathetic run time :( Less...