Brand new bike.
Bike standing still, I have three bars. Under power, it lowers to 1 bar.
Is this normal?
I believe I've seen the OEM led indicator on my Radrunner drop more than one light under a heavy load of more than a few seconds (a hill). A few minutes later, I could do the same thing without losing lights. I think battery temperature is a factor. The first hill warms the battery, so it works better subsequently.
Cranking, a car battery might drop to 11 volts warm and 8 volts cold. When the electrolyte is cold, the ions can't move as fast, resulting in less voltage under load.