Features:

• Temperature compensated for optimum charge voltage
• Automatically switches from full charge to float charging mode for top performance
• Reverse polarity protection to ensure user safety
• 10-year warranty
• Safe operation

Editor Reviews:

Product Description:
BATTERY TENDER CHARGER

Rating : - Good, but it needs to catch up with newer battery tech.
The Deltran charger does exactly what it should, which is charge Lead-acid and AGM batteries. The only issue is that this model isn't quite right for 'GEL' type batteries, used on some cars (BMWs) and motorcycles.

GEL batteries require slightly different charging voltages than lead-acid and AGM batteries. Deltran makes a different model (021-0156) for GEL batteries, but with all the software and tech the claim to bring to the game I'd think they could combine the functionality into one charger.