I would give 5 stars, but I think there is always room for improvement so I give 4.5. Overall great battery and so far works flawlessly.

Order Saturday receive on Wednesday to eagle mountain lake Texas thank you for the great service….

I have had the 31 AGM in my boat for over a year now, and used it in both extreme hot, and below freezing conditions. The 31 AGM in my opinion is the very best cranking battery on the market today. Best Battery Period!

I recently got this battery charged for 4 hours the night before I left to fish. Fished Monday and Tuesday without charging in between running three garmins, livescope, and using it as a cranking battery by the end of Tuesday I was still showing 12.3v on my screens it’s seems to be working a lot better than my last few batteries. 100% worth the money.

I’ve ran this battery as a stand alone cranking battery for over a yr now without a hiccup. Multiple days daylight till dark in extreme condition cold and hot Including last yr at the classic with heat index well over 100.