The Solar CCA Digital Battery and System Tester is a good way to check the health of your battery. Not only does it check the voltage reading, it also checks the CCA (cold cranking amps) to check how your battery is truly operating. The Solar technology report notes that any CCA reading below 20 percent of its rated CCA indicates a battery that is about to fail. So, if a battery is rated at 1000 CCA but is only producing 700 CCA, it’s a sure sign that it’s not going to last very long. Thus, this device gives a comprehensive analysis of your battery’s lifespan. As well as accurate battery lifespan, it is also able to test alternator and starter tests. This is a great automotive battery tester and ultimately tells you the state of your battery’s health, the state of its charge, and its internal resistance.