VMAXTANKS Vmax857 Battery | Details Review & Guide

Our fishing season is right around the corner, and people are preparing for it with full speed ahead. And needless to say, the battery for your trolling motor is, as usual, yet again the center of focus to get for every expert anglers. Which is why we are on a mission to help you find the best trolling motor battery in the market. And for today, we will be looking into the VMAXTANKS Vmax857 battery.

We have heard both ways about the VMAXTANKS Vmax857 battery, mostly great things. But we don’t want to rely on just word of the mouth. We want to find out the truth for ourselves and that’s exactly what we will be doing in our review of the VMAXTANKS Vmax857 today. Let’s start!

— VMAXTANKS Vmax857 Battery —

VMAXTANKS Vmax857 image

At First Glance

VMAXTANKS has been producing some amazing batteries for the crowd over the year, and from your very first look at this battery will tell you that the Vmax857 is probably no different. It is rather small and compact in size, which we very thankful for. The battery weighs under 25 pounds and measures 7.7 x 5 x 6.1 inches in dimensions, and it will clearly stop from hogging much of your boat space.

This battery, thanks to its perfect size, allows you to mount it in pretty much any position you like. Perfect for small vessels! And it furthermore includes a convenient handle, making it very easy to carry it to and from. Well, so far so good, but now let’s look into features more closely.


The VMAXTANKS Vmax857 battery is 12-volt AGM deep-cycle battery. It is therefore perfect for use on small boats where you may need to run a trolling motor. Some of the recommended trolling motor that you can pair it with includes the likes of Minn Kota, Cobra, Sevylor. You can, however, use it with pretty much any trolling motor that needs a 12V battery with a capacity of 35 Ah which falls into the U1 group.

Having said that, you can of course also power onboard accessories like your phones, fish finder, radars, portable fans, etc. Keep in mind, however, that this guy not up for large, heavy-duty and demanding jobs. Power for small boats and kayak, along with all their accessories is what it does best. But it will of course also work on small cars and RVs. Let’s see how much it can do for us.


Speaking of Ah, the VMAXTANKS Vmax857 battery can provide with 35 Ah and has a 20-hour capacity. And with a CCA (cold cranking amp) of 300, it more or less has a good performance even in unfavorable temperatures.

The VMAXTANKS Vmax857 battery furthermore has a reserve capacity of 75 minutes which is pretty okay. And then you have the 6 mm terminals posts which are, of course, included in the purchase. One thing that stands out about this battery, however, is that uses very thick, military grade metal plates which make the battery go that extra mile in term of durability and performance.

But it’s good to know that your boat’s speed and the condition of the water will more or less manipulate these numbers.

Ease of Use

First, because the VMAXTANKS Vmax857 battery is a maintenance free or sealed battery, you can expect it to work for you without little to no adjustments. And since it is a rechargeable one, you can even top it up with distilled water whenever you need it.

Second, the VMAXTANKS Vmax857 batteries have a reputation for their ability to recover from deep and repeated discharges.

And finally, other than being compact and all, the high-quality ABS plastic body holds up pretty nicely over the years if you use with proper care and follow instructions. There should be no warped plastics or cracks as far as we are being able to tell now. The VMAXTANKS Vmax857 battery is also resistant to shocks and vibrations. It is furthermore so perfectly sealed that we can almost guarantee you that it is leak-proof and spill-proof. The battery is overall very solid and robust.


  • The Vmax857 battery is very small and lightweight; great for small boats
  • Is rechargeable
  • Uses thick, metal plates (military grade) and thus it holds charge very well
  • Works well even after repeated and deep discharges; works well even in unfavorable weathers
  • Is spill-proof and shockproof
  • Has a handle to make carrying easier


  • Not recommended for big boats or heavy-duty, demanding jobs
  • Posts on the terminals have a tendency to loosen the connectors


— FAQs | VMAXTANKS Vmax857 Battery —

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  1. What kind of battery charger would you recommend for the VMAXTANKS Vmax857 battery?

Answer: Good question! We strongly recommend that you use only an AGM-compatible battery charger. Look in the VMAX BC1204 12V 3.3a amp battery charger if you can. It should deliver to the VMAXTANKS Vmax857 battery brilliantly. However, you can easily use the Minn Kota one too.

  1. Can I use this a cranking battery?

Answer: We rather have you not doing it. It is strictly a deep-cycle battery only; not a starting battery, not a dual-purpose. So, for the sake of your battery’s life span, don’t.

— Final Words —

Your battery will need to feed a lot, and the VMAXTANKS Vmax857 is definitely up for the challenge. It is undoubtedly one of the more resilient deep-cycle batteries we have reviewed in a while. Having said that, there are limitations to it. It isn’t very much a tough guy so only small projects are with it. But no matter what, the VMAXTANKS Vmax857 battery is giving us a lot more than we are paying for. It is compact, effective and durable. We don’t see you having much trouble using it. Highly recommended.

This concludes our review of the VMAXTANKS Vmax857 battery. We hope our review helped you to see the battery in a clearer perspective for what it really is. Check out the product link for more info. Take care!

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