Hello dear coaches: I made a mistake with the setting up my VESC via the Android VESC Tool.
I ran the battery down too far (cell ratings below). Then, however, the battery charged as usual up to 4.2V each. Then I updated the VESC firmware to 5.2, and may have set the VESC up differently.
Now the acceleration is far lower than before, about 20% of previous amazeballs, however top speed is still the same (nice). Could you please have a look at the settings and readings, and help me assess if I screwed the battery, and/or if my VESC settings are wrong? Thank you so much…
My Kit: FocBox Unity VESC Firmware 5.2 (recent update)
Trampa Long Mountainboard Frame
Trampa Precision Vertigo Trucks
Trampa 8inch Hypa Wheels
15mm 470mm Timing Belt
Pulleys: 15 (motor) x 72 (wheels)
Idea 3-part Motor Mounts
2x Turnigy 12000mAh 6S 12C Lipo in 12S1P Configuration
2x Turnigy SK8 6374-192KV Sensored Brushless Motors
My Mistake:
Mistakenly discharged too far to the status below (VESC still showed 23% left 
Battery 1: 3.43 / 3.18 / 4.21 / 3.25 / 2.97 / 3.33
Battery 2: 2.96 / 3.34 / 2.98 / 3.10 / 2.47 / 2.83
My Battery Test:
Battery Charge: Standard and normal charge to 4.2V each
Battery Status after 8km:
Battery 1: 3.96 / 3.96 / 4.03 / 3.98 / 3.97 / 3.97
Battery 2: 3.98 / 3.95 / 4.02 / 3.97 / 3.95 / 3.95
My VESC Profile:
Speed FWD: 40kmh Speed Rev: 10kmh
Current Acceleration: 70%
Current Brake: 70%
Motors FOC wizard settings:
Medium Outrunner
Battery Type: Lithium Iron 3.0-4.2
Battery Cells Series: 12
Battery Capacity: 12 Ah
Battery Current Max 100A
Battery Current Regen -25A
Motor Pulley 15
Wheel Pulley 72
Wheel Diameter 192mm
PPM remote
Control Type: Current No Reverse with Brake
Median Filter On
Safe Start On
Positive Ramping Time 0.4s
PID Max ERPM 15,000
Smart Reverse Max Duty Cycle 7%
Smart Reverse Ramp Time 3s
Traction Control Off
TC Max ERPM Difference: 3000
Motor Config:
Medium Outrunner Motor Type: FOC
Invert Motor Direction: Off
Sensor Port Mode: Hall Sensors
ABI Encoder Counts: 8192
Max Motor Current 74.37A
Motor Current Brake: -74.37A
Absolute Max Motor Current: 400A
Battery Cutoff Start 40.8V
Battery Voltage Cutoff End 36V
Max ERPM 36943.74 (=40km/h)
Max ERPM Reverse -9235.93 (=10km/h) ERPM Limit Start 80%
Max Wattage 1500000W = 1500kW
Max Breaking Wattage -1500000W = -1500kW
Acceleration Temperature Decrease 15%
MOSFET Temp Cutoff Start 85degC
MOSFET Temp Cutoff End 100degC
Motor Temp Cutoff Start 85degC
Motor Temp Cutoff End 100degC
BMS Temp Limit Start 45degC
Temp Limit End 65degC
SOC Limit Start 5%
SOC Limit End 0%
Advanced: Max Input Voltage 57V
Minimum Duty Cycle 0.5%
Max Duty Cycle 95%
Min Current 0.05A
Fault Stop Time 500ms
Aux Output Mode Off
Motor Temp Sensor Type NTC 10K at 25degC
It’s LiPo, but the VESC tool android app only offers LiIon as a range from 3-4.2V.