Review on Mroinge 6V / 12V 1A Fully Automatic Trickle Battery Charger/Maintainer For Automotive Vehicle Motorcycle Lawn Mower ATV RV Powersport Boat, Sealed Deep-Cycle AGM Gel Cell Lead Acid Batteries by Jody Kashani

I have several of these and they all work well. The materials appear to be a little bit cheaper than a Battery Tender, but on the other hand, I bought my first one to replace a Battery Tender that died for no apparent reason. So spending more money on the Battery Tender is no guarantee that it will last forever.