Features:

• 6-volt and 12-volt battery charger; automatically changes from full-charge to float-mode monitoring to prevent overcharging
• Ideal for keeping batteries charged while in storage
• Rugged plastic housing
• Includes charger, jump cables, ring connectors
• 7.1 by 10.5 by 5.9 inches; 5 pounds; 1-year limited warranty

Editor Reviews:

Product Description:
Float-mode monitoring keeps 6 & 12 volt batteries fully charged; Auto-switch from Full Charge to Float-Mode Monitoring; LEDs indicate: Charging, Charged and Trouble; Quick-Disconnected Harness - Snap connectors in seconds - Use 50-amp clamps or permanently attach to hard to reach areas; Maintain batteries on seasonal equipment; 1.5 amp charger & maintainer; Reverse-polarity protection; Perfect for small batteries

Amazon.com Product Description:
Schumacher's SEM-1562A low amperage charger is an ideal way to maintain a battery's charge for people who don't use their vehicle everyday, who go short distances, or who do lots of stop-and-go driving. It can also be used to charge small batteries for ATVs, motorcycles, snowmobiles, and lawn tractors, or even for batteries that have a long storage time. In cold climates, they're indispensable for keeping batteries warm overnight and ready for starting.

The SEM-1562A charges both 6-volt and 12-volt batteries.

Versatile
The SEM-1562A is perfect for charging small batteries, maintaining small and large batteries kept in storage, and batteries for motorcycles, classic cars, TVs, and boats. It's small enough to fit under the hood of your car or truck.

Safe and Effective
The unit has a quick disconnect harness for easy removal. Use the 50 amp clamps to connect to the battery or permanently attach the ring connectors--great for hard to reach motorcycle batteries. It also has a reverse hookup protection in case the clamps are accidentally connected to the wrong terminals.

Warranty
Every Schumacher power source comes with a one-year limited warranty (90 days on battery).

Rating : - worth the charge
After shopping and comparing several different devices I decided on the Schumacher and based on its small price, small size and ease of use, I highly recommend this product. I use it to "trickle" a Waverunner and it works great.