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 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!

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.

Great products. Customer service helped me out with a free replacement. Bought 2 12v batteries for my trolling motor. 1 the bms kept shutting off the battery. I'd have to jump start it to get power back. Sometimes once a trip, Sometimes 4 or 5. I contacted CS and they directed me to a couple test to do. After a few back and forth they sent me a brand new replacement. Ive had these batteries since March 2023. Bought an electric jack for my camper hitch. Works great! Definitely will get a battery for my camper next. Good company that backs it's products. I don't know why other had problems with CS.

Please save your money. I have had nothing but issues with these batteries taking a charge. I have had them since July of 2024 and only one of them has taken a full charge. I have been trying to get support through Weize and they will only reply through text. They will have you do all kinds of test and ask a ton of questions and request a lot of photos. I ordered a new battery from them June 2025 while They are having me problem solve the bad battery and the new will only take a charge to 48%, they have confirmed that my charger is compatible. I have asked for a return and refund with no luck as of writing this. Even though it says guaranteed free 30 day returns through Amazon on this item, that is not true, when you initiate return they say it cant because its a dangerous item. You are better off spending up and buy one local that you can get support or return.

These batteries work great! They are super light for the size. I would definitely make sure you use a lithium rated charger.

I bought this as equivalent power lead acid are heavier and only last 2-3 years. I wanted to try lithium due to advertised number of cycles and 10 year warranty. Did not last one season before failure. Tried to force with high quality charger, battery would still not respond. Contacted Weize through their web site. 5 days of emails with them advising me to try tests I had already performed. When they said to test with a multimeter I responded I did not intend to buy equipment for more tests. When I stated I would be reviewing them on Amazon, they stopped requiring more information and I received a new battery 5 days later. I still like the light weight and hope this battery lasts longer.Update: Received replacement battery. Customer service worked hard to make situation work out. I live in the north so won't really know until spring if new battery lasts longer.

Work great and if something goes wrong they will send you another replacement. I have 3 100ah and 2 50ah. They need to come out with the Bluetooth that show the battery life next.

The batteries have worked well in our travel trailer so far. I purchased the Weize lithium charger as well to keep them maintained. They charge much faster than our previous deep cycle lead batteries.