BAstro 7765 12-volt Onboard Battery and Alternator Load Tester ReviewbP PP Astro 7765 12-volt Onboard Battery and Alternator Load Tester PAllows you to monitor the condition of your battery and chargingalternator system using an easy to read LED displayPUnit will let you know when replacements are actually neededPFor use on all standard 12V systems with 18mm postsPRing terminals and a hook and loop backing provide permanent mounting optionPWeatherproof for additional safety and durability and manufactured to ISO9002 quality standardsP