Had one of my new batteries give me this error this morning. (Low Voltage)
***Don't leave the charger unattended!! As always when charging these batteries there is a risk of fire. Do not leave charger unattended.***
Only use the NiMH setting (<1.0A) for less than 60 sec.
You just want to get it so that it passes the low voltage test on a LiPo Batt setting.
Then change over to a LiPo Batt setting on the charger.