Amazon – Schumacher BT-100 100 Amp Battery Load Tester – $15.59

Schumacher BT-100 100 Amp Battery Load Tester – $15.59 after 35% coupon
Tests 6 and 12 Volt batteries up to 1000 CCA, ideal for cars, light trucks, RVs, motorcycles, ATVs, boats and lawn tractor batteries
100 Amp load test for 12 Volt batteries; 50 Amp load test for 6 Volt batteries
Tests load, battery condition, starter motor draw, with complete charging system diagnosis
Top-mounted rocker switch for easier operation
Includes super-grip, heavy-duty, color-coded battery clamps
[ https://www.amazon.com/Schumacher…oad+Tester