On the first use, after reading through the user manual, the unit started smoking.

I got this to charge up an Optima yellow top that is 3.5 years old and kept draining to low volts because of a car alarm/remote start system

After one false start, telling me to check the battery, it fully charged the batteries to a full 13.36V.

After the last cold spell here in ohio, and likely affected by insufficient charge, starting the vehicle revealed a sluggish start

But I actually read the manual for the first time and since that, I’ve recovered 2 of my battery’s that have been well dead for years

Bad A$$.Love

The charger worked as it should for the first couple of charges, but then all of a sudden it would get stuck in 'charging' mode indefinitely no matter how long the charger was left connected to various batteries, never advancing to maintenance mode on the LCD display.

Depressing as it is a sealed battery that shouldn’t vent and prior to now has never had any issues

After a couple failed battery charger purchases, the Optima performance maintainer works as it should