These new cars have computers that draw on the battery even when the car is not in use. With 6 motorcycle and 2 four wheelers they get plenty of use. I am confident that this little tender is keeping the battery in top condition.

Installed the 12 volt battery tender to the generator battery. Tender maintains the charge on my batteries while they sit idle.

Some polaris atv's have a remote battery charging point that works with the battery tender cord by just disconnecting the alligator clip portion and plugging the cord directly into the remote point. Very simple to use - clip leads onto the battery ter...  Read More

If you hook a maintainer like this to your battery it can cook all the electrolyte away, ruining the battery or severely decreasing it's lifespan. They fail to go into maintainer or float mode and just keep charging and charging instead of stopping li...  Read More

Costs to return for warranty evaluation make that impractical. I guess i chalk this up to rising costs over the intervening time and the general worsening of quality of electronic items.