Have HVAC Questions? Ask an HVAC Expert for Answers
I will be happy to help. The front should pull straight off the wall, leaving the sub base attached to wall .This will expose the batteries and allow you to change them. Be careful to make sure they are installed positive/negative. Let me know if you have further questions before rating.
AS for the charges, I am not in the administration department,I am an expert earning my living be answering questions and helping people solve there ac issues without having to call in a 100 dollar per hour technician.There should have been a selection of how much you were willing to pay for assistance.It appears you must have selected to 28 dollar option.
I am here to help you if it takes 5 minutes or 3 hours.We strive for 100 per cent satisfaction.so you may request a refund if you misunderstood and want to close the question.