Battery tester recommendation needed

think it is better to have one if it does not cost too much to save trips to Autozone. 

 

is this one a good choice?

Amazon.com: KONNWEI KW208 12V Car Battery Tester, 100-2000 CCA Load Tester Automotive Alternator Tester Digital Auto Battery Analyzer Charging Cranking System Tester for Car Truck Marine Motorcycle SUV Boat : Automotive

Thanks!