Weize 12V 100Ah TM LiFePO4 Lithium Battery, Built-in Smart BMS, Group 31 Deep Cycle Battery Perfect for Trolling Motor, RV, Solar, Marine, Overland/Van, and Off Grid Applications

I have a solar generator set up and these are running the "backup". I have had a few hit and miss battery purchases over the past few years (broken boxes and batteries leaking on arrival, batteries that rattle when you shake them). These came well packaged and decently charged right out of the box. They do run a bit lower voltage (within 1v) compared to some LiPos I have used, but this works out perfectly for my use. I can't speak to the longevity, but compared to some of the "cheaper" batteries you can find here, these seem to be a great value! The included battery post protectors are pretty neat too!

So far this battery is working as advertised. Lighter in weight than the previous lead acid battery. This battery replaced my battery used in my RV. Only issue I have is that I should have bought the mini size battery as this would have fit right in place of my battery box and the mini one has the exact same capacity. I had to modifiy my original battery brackets because this battery I bought is package bigger. Also does not have car terminals style clamps, this battery comes with screws. So I had to buy battery connector ends and crimp that to the battery cable. Good product so far.

Great choice of battery for my Newport Electric Outboard Motor. Light, space saving and holds a charge.

****Update February 10 2025****I opened a ticket with Weize customer support. They responded within 24 hours and were very consistent with always replying within 1 business day throughout the process. They had me perform a number of tests, take pictures, provide additional details of the situation, provide details and documentation of the charge controllers I had tried to use.I will admit I got annoyed at how much they had me go through. However, I was outside of the warranty period so they had no obligation to help me at all. I appreciate that they worked with me when they weren't required to.My replacement unit arrived today and I tested the voltage before I even removed it from the box (which I should have done last time). It tested good and I have it hooked up to my solar installation now.I haven't had my replacement for long enough to do a full product review, but I can definitely say that Weize customer support is good. A separate customer support person even reached out to me after seeing my Amazon review to make sure I had a support ticket open.***Original review January 24 2025***I have been wanting to upgrade my solar storage from lead acid to Lithium for a while and picked this up during a sale. I knew my charge controller couldn't handle LifePo4, so I set this aside after unboxing until I could find a good deal on a new charge controller.I finally got a good deal on a Victron and started upgrading my system. That's when I stuck a Multimeter on the battery and realized it was only reading 7-8 volts. Up to this point, this battery was unused and still had the plastic caps on it, I even had to hunt down the terminal bolts as they had been "cleaned up" at some point in the previous 11 months.I figured those readings meant the battery was toast, but decided to connect it to the new charge controller (set for LifePo4 charging) and see if it would recover. After 4 days it is still only at 8 volts.Just to be sure I swapped in a 20AH 12v LifePo4 battery out of my portable power kit and it charges without issue on the new Victron.Being a LifePo4, this battery shouldn't have had any issues with sitting indoors for 11 months before being put on a charger. I'm disappointed.

Very good battery came charged. I’ve used it for over 2 years and have never had a problem with it. Easy to install. It’s a great battery for campers or off-grid enthusiasts

Bought two of these to backup a basement sump pump. The running current for the pump is 4.5 amps so 50 ah / 4.5 is 11.1 hours. That would be continuous operation which does not happen so I estimate that one of these batteries could run the pump for at least 7 days assuming each day would use 1.6 hours of run time. Hooked up one of these to an inverter during a power outage and it worked fine for about 4 hours until the power came back on. The initial voltage for the battery was 13.1v and after 4 hours it was 13.08v which I think means it has a whole lot of reserve power.

I haven't had this long (~5 charges) but compared to lead-acid, what a difference! This is now my 50 lb thrust trolling motor battery and I couldn't be happier. Higher end batteries of this type can be several hundreds of dollars. This one was in the $250 range. It has a 10 year warranty, which is double most, but even if it lasts 5 years, that would bring it into the same price range of a couple of lead-acid batteries. A single charge lasts significantly longer than a lead-acid battery so I no longer worry about running my motor on '5', for fear of losing power before I'm done fishing. The weight is also about half, which is important in my 12' fiberglass boat. And charging, which often wasn't complete by the next morning, with a lead-acid while on fishing trips, is complete in the middle of the night with this LiFePO4. Note that this battery type requires special charging, but most chargers, even low end ones, now have this option. While this review mainly focuses on the advantages of LiFePO4 batteries, and not this brand, I haven't had it long enough to single out brand differences. I will say though that the price of this one stands out as do warranty and how solid it appears. I'll update this review if I learn more over time.UPDATE Jan. 2, 2025:I used this battery fishing lakes all summer and on several trips in the fall. It is still performing as well as it did when I got it and I have nothing but great things to say about it. For a trolling motor, pass on buying lead-acid and go LiFePO4. If the price remains good, this brand has my strong endorcement!