I have a Q500 4k that has been in storage for 6 years. I removed the batteries from the Q500 & ST10+ at that time. I thought it would be fun to wake this bird up from hibernation and fly it again. I have a new q500 battery on the way as the one in storage for 6yrs doesn't seem to charge . The st10 battery seems good...... What's the best approach and steps to take to succeed in flying this bird again after a 6 year nap?? Battery should be here this Friday. Thank you, Jim.