2024 ACDelco Tech Challenge - March 2024

Last month we asked this Tech question and invited you to share your answer. We value your expertise and want to thank everyone who participated!

What is the voltage restriction required when charging an Absorbent Glass Mat (AGM) battery and why?
14.4 v or less. AGM batteries have very low internal resistance and can be damaged by charging at higher voltages and current rates. Using a charger designed for AGM batteries will keep the voltage at or below 14.4 vdc, and taper the current down as the battery approaches 80% charged to prevent thermal run-away.
Congratulations to the following shops who answered this question correctly and will be receiving a prize pack!
  • Patrick at Big O Tires Port Kells in Langley, BC
  • Mario at All-Tec Auto Centre in Edmonton, AB

The Tech Challenge question is published in our weekly eNewsletter with an online answer form. Fill out the form with the details of how you would perform the repair to be entered for the chance to win the prize pack. You can also submit a challenge for future Tech Challenges! A draw is conducted with all shops who answered the question correctly and one is selected as a winner for a prize pack.
Got a Tech Tip you want to share for a future Tech Challenge?  >>CLICK HERE to fill out our question form.
Watch for our next Tech Challenge question in our eNewsletter. Visit our blog page for more Tech Tips