Ansmann Battery Tester for N AAA AA C D and 9V NiMh Nicad or Alkaline Batteries. Review:
A bit expensive
I use Ansmann batteries for my speedlights and purchase the Ansmann Tester. All Ansmann products are excellent values. The Tester is expensive and bulky. However, if you are using a speedlight(s), this tester may be worth the few extract dollars. Rechargeable battery discharge quickly. In the middle of a shot this would be an embarrassment to creditable as a professional.