OPTIMA Batteries OPT8016-103 D34M BlueTop Starting and Deep Cycle Marine Battery

Great battery no complaints

This is the ONLY battery you'll ever see in my boat !! Holds a charge a long time and can go the distance running lights and sound system for hours then still crank the boat up like a boss. I keep a tender on it all winter, then in Spring it fires my boat right up like it was brand new !!

I am like a lot of people wanting to save a few bucks. Unfortunately when you buy economy batteries you often lose money in the long run. This was the case for me so this time I went with a recognized industry leader. Optima batteries are top of the line and the difference in power and run time increase with these batteries is amazing. One word of caution. These are AGM batteries and they must be charged with a charger programmed for AGM batteries. If you use the wrong charger it could damage or destroy the charger and/or the batteries. Fortunately the onboard charger in my bassboat is designed to charge all types of batteries and a simple change of a screw in sensor ensures I will have these batteries in service for a very long time. When these batteries were delivered one of them was upside down. You can mount AGM batteries at any angle because there is no possibility of losing acid from the battery. The acid is soaked into fiberglass pads inside the battery. They were fully charged when I received them and I fished 2 long days with them before charging for the first time. I would highly recommed these batteries for any marine application. For the fishermen who have not used AGM battrries a word of caution. AGM batteries provide full power until they are dead. Most batteries will provide less and less power as the charge is depleted. That is a positive thing. Just know that when your battery loses its charge you have no notice. I charge every time I go fishing so I dont see this as a problem..

Use this batterie on my boat working great

I bought this battery a bit over 1 year ago (on May 2023). Even after completely charging the battery on an OPTIMA charger, the battery would barely crank over a 20 hp outboard motor. I should have tried to return the battery then, but it still worked (barely), and I needed it for the boat. In Nov 2023 the battery was placed on an OPTIMA charger over the off season. Once again, this spring, the battery is still weak. The battery is not much better than the OPTIMA battery I replaced which I used for 9 years! Very disappointed and I will not be purchasing OPTIMA batteries again. UPDATE: I called customer service and explained the problem, and they will honor the warranty. Following the phone conversation, I got an email that said: We will need a picture of your proof of purchase and a picture of the bar code on the side of the battery Put your case # in the subject line and email to [email protected] I have yet to send in the info, but it seems like I will be able to get a replacement (I'll update here if I do not) So, great Optima customer service! (I knocked off one star as I did receive a faulty battery) Last update: Replacement battery just arrived!! Added back a star