This is an increase in the battery pack from three to six batteries. This allows us to increase capacity. I used six new high-current (30A) Sony MURATA US18650VTC6 batteries with a capacity of 3100mAh. The voltage remained the same, but the capacity increased from 1.5Ah to over 6Ah. Package welded in 2S3P. The BMS was original. I used a resin printer, but you can easily print on FDM printers.
The author marked this model as their own original creation.