Had a new starter battery fitted in August. As we have a tracker fitted there is an app that gives us the battery condition / voltage. It runs down from 13.9 volts to 12 volts in about a week unless we use the moho. Battery has been tested and is fine. Is there an advantage of fitting a trickle charger and if so, any recommendations of makes? Would it be ok to plug in the trickle charger to a moho plug socket as we keep the leisure batteries charged via mains hook up and roof mounted solar panel?