Battery Load Tester Recommendation

[Donald]

Well....here is mine. About 50 years old. I acquired it used. Not very high tech. Works good and never let me down.
View attachment 248532

You really need to be putting on a load of 1/2 CCA. for 15 seconds (it might be 10, anyway the load tester will beep). The one pictured is probably 50 or 100 amp.

Also a temp compensating scale is helpful.

But what you show is better than nothing or a DVM.