Here's their warranty info from the website:
Warranty
All of our flashlights are covered under our Limited Lifetime repair/replacement warranty against manufacturer's defects. It also has a 30-day satisfaction guarantee. We encourage you to check your Arc thoroughly within this 30-day period to make sure you absolutely love everything about this light. If you need repair/replacement or have any questions:
Arc Flashlight LLC
1835 E. 6th Street
Suite 21
Tempe, Arizona 85281 USA [email protected] www.arcflashlight.com
Local: (480) 752-8554
Toll Free: 1-888-752-8554
Jeff have you tried the FAQ's at the top of the ARC forum. There are several things in there about the ARC AAA and what causes it not to work.
I know cleaning was one of the issues.
Just a thought.
mut