Can this charger be left on charge, does it turn it self on and off and not overcharge?
If the unit is going to sit for some time without use, you will want to make it a point to charge the unit once or twice a month for at least 8 hours in order to maintain the battery’s health. We do not advise to keep a charger constantly plugged in, just in case the charger malfunctions and causes the batteries to over charge or swell. All battery chargers do come with an automatic shut-off to prevent this, but shouldn't be relied on in the event it stops working.