Mighty Max Battery 12V 100AH Battery for Solar Wind DEEP Cycle VRLA 12V 24V 48V

I bought this as a second battery for my 44lb thrust trolling motor and it lasts so long I only bring the one battery with me now. I’ve had multiple days that I’ve spent 8+ hrs on the lake and at the end of the day it still has about a 35% charge. I’ve used it on both my 12ft Jon boat and on my 8ft pond prowler as the only motor and it works fantastically. I can’t speak to longevity as I’ve only owned it since May of this year (it’s July as I write this) but so far I’m very impressed my old battery only lasted 4-6hrs this one I’ve gone over 8hrs and the lake I fish is 1700 acres so I spend a lot of time driving yet it still has plenty of charge by the end of my trip.

This battery is very heavy but that is what makes it an performance superstar. The denser the battery the longer it performs, I ran a 32" tv and a roku on a 500w inverter the other day when the electricity was off because of a storm for about four hours and when the electricity was restored it only ran the battery down 1%. Granted the tv and roku are not a big electric load in watts I was still impressed with the performance of the battery for the money. I will be testing the battery with heavier loads in the future but for now I'm impressed with the performance for the price. I will update this review if it doesn't meet my expectations.

Never heard of Mighty Max and was reluctant to purchase but the reviews sound good so I bought this to replace the house battery on my Pleasure Way B van. There are 4 red lights on my battery check and after a night of lights, TV, computer, etc., my older batteries would show 3 or 2 red lights. I couldn't believe the Mighty Max. It showed 4 red lights consistently. I drive everyday and recharge the battery. It did drop to 3 lights a few times when we watch more TV but not many for the 4 week trip we were recently on. Very Impressed!Now, if it lasts several years...

3 years into use in a 400W + 200Ah solar system, the batteries are still just fine. One does discharge a bit faster than the other even though they have always been used in parallel. (removing the parallel connection shows a slightly different voltage) One of the batteries was weak when I received it, and was replaced with free return shipping. But that was then and this is now.I'm going to build another, bigger, system and I noticed that even when sold by amazon.com these are not marked "Free Return". Just Free Shipping. I contacted Mighty Max and asked about returns... get ready to pay UPS for a 60 pound hazardous box if they're not right when you get them! Minus one star.Here's what the manufacturer says as of Jan 2021: "As per Amazon's return policy, a customer has 30 days from the original date of purchase to return their order for a full refund. Luckily, the manufacture extends a 1 year warranty on all defective items. While return shipping is not included under the manufacture's 1 year warranty, our company does offer alternative options to our customers in order to lessen the burden of a return. When applicable, we ask that our customers reach out to us directly in order to proceed with their warranty claim."

I ordered one more battery than I needed, and even though the order was about to be shipped, Mighty Max was still able to edit my order when I sent them just an email. Great customer service.The battery is a little pricey, especially when I could get a much larger AH battery for the same price, but it is well worth it. This battery has left me satisfied for almost a couple of years now, with no signs of wear and tear, or breakdown.The battery life is also another plus. It has a very long battery life. I was able to hook up 8-100 watt solar panels to a couple of nice 50 amp charge controllers, then to 3 of these Mighty Max batteries linked in parallel. From there they power a 5,000 watt modified sine wave inverter, which then runs a pretty large-sized refrigerator, a couple of computers, about 10 LED light, a medium sized AC fan, and a 52" flat screen TV. It keeps all of these powered for up to 5 days if there's no sun. Or during larger storms/ hurricanes, It kept a small tv up and a large fridge up and running for the better part of 2 weeks (we also had 1 AC fan running and 3-3 watt LED's running during that time, but we did turn off the lights and fan whenever we weren't using them. Really we just left them off most of the time unless and appliance started over-heating).

We've had the battery in our RV for about six months, and it has been working very well with our setup. Remember as an AGM battery, you only get about 50 amp hours of usable battery. For us, that's plenty, and we're very happy with the battery! We like it's low profile, which was necessary to fit into our battery compartment. So far it's doing well and keeping us powered!

I purchased this battery May 2019 for a replacement for our popup camper. I was very excited because the price seemed really good for the size and Ah compared to other AGM batteries. $175 vs $300.We used the battery on 1 trip out to Colorado camping and 2 other weekend camping trips. Used ONLY 3 TIMES.We stored our camper away for the winter unhooking the battery from the camper. Fast forward Jun 12th, we pulled the camper out for the first trip of the year, got to our site thinking the batter would charge up on the drive. DEAD!! Completely dead!! Made do without for the weekend came home and threw it on a charger... DEAD!!Took it to batteries plus had them charge for 8 hours.... DEAD!!I emailed Mighty Max directly hoping to get some help and they said I'm out of luck because the warranty is only 12 months. On the phone they offered to possibly give credit or a new battery but not under the mighty max band, it didn''t matter to me. I wanted something other than a $175 60lb paper weight. Went back and forth with a few emails asking to get it tested. I got it tested at both Advanced Auto and Interstate Battery, each test confirmed the obvious. Battery was junk. I emailed that information in and within 1 day they said UPG (must be the parent company) denied the warranty claim.I know for a fact this didn't "go bad" in the 30 days out of the warranty. 13 months! Used only 3 times!! The company refusing to help is really BS.This is your fair warning STAY AWAY FROM THIS BATTERY AND COMPANY!

Bought 2 and they performed to specifications, have a low voltage disconnect set to turn off load at 35% and calculating Amp/Hours and at low voltage disconnect I did get 65 Amp/Hours (Ah) of use.To ensure battery longevity you should only discharge down as low as 11.8 volts (35%) and battery should last for a long time.I have another brand of battery made by Alpha Cell, model GEL 210 GXL that have a date code from 2007 and they are still in service with 85% capacity when tested recently. The battery will last as long as you treat it.Not using a low voltage disconnect on any deep-cycle battery will shorten the life dramatically if battery is discharged below 35% (11.8v) - So the low star reviews that claim the battery does not perform well likely have ran the battery below 35% frequently.Hoping this 3rd battery I just ordered is as good as the first 2 Mighty Max 100Ah batteries I have had in service.