Grandson's Mobile Car purchased from Toyworld some time ago and it stopped working. It was sent in for evaluation and it was found tthat Battery was 'dead'. Toyworld then recommended the said Battery. However, upon installation it was found to be ineffective. The Old Battery had a rating of 12v 4.5ah. I thrn purchased a Battery with the correct 12v 4.5ah from your Companyand the motorcar is working perfectly.