回答“Why is my cosmo robot tuning off out of nowhere?”How do I check the battery. basically my daughters cosmos shuts down within 2 minutes, placing him on the charger allows connecting within 10 seconds, but goes again. Then after a few tries, he has to be on the charger for awhile. sounds like perhaps battery to me, unsure, anyone agree/disagree? if it is the battery, how do I buy and install a new one.