I took a fully charged 12v AGM battery (as a test) and tried using this charger. The device stayed on the "orange" level (at 16.5 volts) for over 30 minutes and "roasted" my fully charged battery. After 30 minutes the LED turned green and over time the charge voltage slowly dropped to 12.98 VDC. I have several old Schumaker chargers like this one. They work fine. These new microprocessor controlled chargers suck! Bayer watch out.
Mroinge Automatic 6V/12V Trickle Charger For Vehicles, Motorcycles, Boats And More - Maintain Your Batteries With Ease!
29 Review
CARKU Pro-10 black/red
91 Review
Charger Vympel 57 black
110 Review
Keep Your Battery Fully Charged With A Smart 12V Charger/Maintainer Featuring Winter Mode
28 Review