Test My Batteries: East Penn Group 31 AGM (Stud Thread, Part # 9A31)
Welcome to TestMyBatteries.com video, featuring East Penn's Group 31 AGM. We will conduct our standard procedure test (still tweaking at this time, cough c/20 no go on load tester *cough*) which consists of 2 Inductance readings (both are calculated values based on room temp (garage heated to 60 degree F) and temperature of rating (CCA = 0F, CA=32F). Finally we follow up with a video of the load tests, from 1C and 3C continuous draw to a final peak power draw (for wattage). Below is a breakdown of product and results.
Product size: Group 31 (BCI)
Product Capacity: 100AH (c/20hr)
Terminal Type: Stud Post
Product Manufacturer: East Penn (Deka)
Product Part Number: 9A31
Tests
Inductance Test (CCA) : 1110 CCA
Inductance Test (CA) : 1415 CA
Inductance tests were done on a GR-8 by Midtronics
Load Test
C/20 = Failed Attempt, will not use this in future tests*
1C = 100 Amps (1 x Capacity) = 11.9v avg. under load
3C= 300 Amps (3 x Capacity) = 10.8v avg. under load
Peak Power (W) = 480 Amps @10v = 4800w
Peak Power (W) = 680 Amps @ 9.0v = ~6100w