Hi. I had been working through some calibration troubleshooting and fixed some errors (I had been trying to calibrate in Safari which failed but worked fine in Chrome. Also I had failed to hook the little holes over the black pin for the 4 silver motors).
Now when I try to re-calibrate I find that the battery level is low and there is a "squealing" noise. I have plugged it in to my laptop to re-charge but the squealing continues and the blue charging light does not come on. Previously this had worked, although seemed to run out of charge very quickly (as in a few minutes of fiddling with the calibration =/- buttons).
How long should the battery last, how long should it take to fully charge and why might the blue light not come on?
Many thanks Catherine