Keep an eye on the cells in your new battery packs. I installed an identical battery pack (from same seller) in January, and after just three months of very gentle use (as you can see from the cycle count) one of the cells is already failing:
To protect the cells I set the low voltage cut-off at 3V, and when cell 9 reaches that voltage the other 15 cells are still close to 3.3V (approximately 70% SOC). As a result I have very little usable capacity in the pack. Clearly, cell 9 has a manufacturing defect, even though it looked OK when i first received the battery pack.
I have sent all the evidence to Luyuan, and am waiting for their engineers to take a look at it.