Chrome Battery has a great selection of 1 AMP battery Chargers/Maintainers.

Xtend Chargers offers our 1 Amp Charger to replace your existing battery charger and bring your battery back to life and to keep your battery as fresh as they day you bought it. Our fully automatic 1 AMP Smart Xtend Chargers provide a charge when needed, then stops charging when battery is fully-charged and the built-in circuit protection guards against overcharging and reverse polarity.

• 5-Stage intelligent Charging characteristics with quick connect harness
• Designed for safety and to protect against reverse battery hookup, overheat/overcurrent and over-charging of batteries
• Fully Automatic: At the end of a regular charger cycle, every Xtend charger automatically switches its output voltage to a safe, storage, or float level that eliminates the need to constantly check on your battery during charging
• For use on 6V or 12V battery systems including SLA, AGM and Gel Batteries
• Automatically switches to float-mode when battery is fully charged to prevent over-charging
• Creates ease of use with three LED indicator lights. Yellow for charging – Green for fully charged/float-mode. Red for a faulty battery
• Guaranteed to meet or exceed original specifications and very easy to use .