I already had a bunch of trickle chargers like a 1 A Schumacher manual wall-wart charger and two of the SEM-1652A and the newer SEM-1652A-CA, as well as several Harbor Freight maintainers (probably less than 0.5 A output) I got for $5. I figured when I really needed to charge a battery, the little 1.5 A Schumacher units meant as maintainers weren't going to be adequate.
Seems pretty decent with an estimated percentage charge capacity and a switchable 3A/12A button and AGM select. I noticed immediately it estimated the charge on my wife's Civic's battery at 89% and at 12 A it was rising fairly quickly. The box was fairly lightweight, and I'm guessing it has a switched mode power supply, since it doesn't weight much and has that light buzzing sound.
I'm looking to use this periodically, maybe once a week since my wife takes out the car on multiple short trips that use up charge without fully recharging the battery. There are also times when there's a dead battery but I don't want to jump start it or wait a whole day for a maintainer to fully charge the battery.
Seems pretty decent with an estimated percentage charge capacity and a switchable 3A/12A button and AGM select. I noticed immediately it estimated the charge on my wife's Civic's battery at 89% and at 12 A it was rising fairly quickly. The box was fairly lightweight, and I'm guessing it has a switched mode power supply, since it doesn't weight much and has that light buzzing sound.
I'm looking to use this periodically, maybe once a week since my wife takes out the car on multiple short trips that use up charge without fully recharging the battery. There are also times when there's a dead battery but I don't want to jump start it or wait a whole day for a maintainer to fully charge the battery.