So, I have a small car vacuum that operates using a 12V car plug. It doesn't contain a battery, but I have a old portable (battery) vacuum for indoors wich motor doesn't work anymore. I wanted to know IF I can use the battery from the old vacuum cleaner and its small PCB to the new vacuum cleaner, use the battery charger from the old vacuum and use the new vacuum's cleaner motor to make all this work. Any help is gladly appreciated! Thanks guys!