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Astro 7765 12-volt Onboard Battery and Alternator Load Tester

Allows you to monitor the condition of your battery and charging/alternator system using an easy to read LED display

Unit will let you know when replacements are actually needed

For use on all standard 12V systems with 18mm posts

Ring terminals and a hook and loop backing provide permanent mounting option

Weatherproof for additional safety and durability and manufactured to ISO9002 quality standards