I was testing two remote-controlled mini cars my son was given years ago. I tried them with fresh batteries, but the batteries in both cars do not hold a charge. Both cars work when connected to the charge station. Both have the ability to radio control direction [forward & reverse] and steer [left or right]. They seem good candidates to repair or hack. One uses 45 MHz and the other 49 MHz. Would someone at VHS be interested? If interested, I can send pictures.