RE: kero start with Li-ion battery
The key samo is to make absolutely sure it is igniting. (if you listen closely you will hear it).
We assume it is, and that the pump is a bit sticky and is not turning fast enough in the cold to get the turbine up to spped. If the turbine is not igniting then ignore the following.
First, hold "Limits" then press "+" button.
You will get a 3 item menu. Select Uaccel1 and increase it maybe 2 to 3 clicks.
Select Uaccel2 and do the same.
Try it now and see how it goes.
Regards,