WEIZE 12V 100Ah Mini LiFePO4 Battery, Built-in 100A Smart BMS, Deep Cycle Lithium Iron Phosphate Battery Perfect for RV, Solar, Marine, Trolling Motor, Off Grid Applications, Backup Sump Pump

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.

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

Game changer, the life on this when running a trolling motor is exponentially better than a lead acid. You won't regret it just buy it. But make sure you get a proper charger. The battery size is small the power is mighty

Used this battery strictly for a small trolling motor on kayak. Never discharged fully, used lithium charger, kept it topped off in off season, and only used maybe a couple dozen times. Battery stopped accepting charge after 11 months. After some troubleshooting and back and forth with customer service, a replacement was sent to me. Not super impressed with the life span of my first one, but the customer service made up for it. I will update after another year with the new one.

This battery worked great for a few months but now it shuts off if I connect it to anything. It shows 12.2 volts on my volt meter and won't take a charge. I contacted Weize and they wanted some voltage readings before and after charging with pictures and asked about my charger. Then they wanted me to buy a new charger even though my charger works fine so I bought the Weize Lifepo4 charger but the battery still won't charge. Weize wanted more voltage readings and pictures and to hook in parallel with a good battery then charge. I have done all this more than once and they are asking for the same thing over and over. I keep doing tests and charging and sending pictures and they respond by asking me to do it again. It seems like each time I send a message to weize it is read by a different person and they don't read the previous messages. I did find another guy that had bought 6 of these batterys and 3 of them went bad within 2 months. Each had the same failure, a bad BMS. I think I will just use the cells from this battery and buy a good quality BMS. If I could get them to replace it and they send me one that fails again I will have just wasted more time.

Came fully charged, and stays charged for hours on my 62lb Newport Trolling motor. Charges super fast and stays charged for days. Great for the price, and super lightweight.

Upon charging these batteries for the upcoming fishing season both 100aH batteries would not accept or hold a charge. I thought it was my Minnkota digital 3 bank charger (which worked without issues in the past) so I purchased a new NOCO 3 bank 10A charger. I selected to "Lithium" and within 1 minute the charging cycle said it was complete. My volt meter read 12.92v on both batteries or approx. 50% SOC yet they would not accept more than that. I proceeded to email "[email protected]" with pictures and descriptions of my issues of what was going on, 5 days later I still didn't have a response so I called the phone number listed on their "support" webpage and got forwarded to an answering machine so I left a voicemail. I did not hear back from my attempts so far, then I emailed again asking if they received my original email. No response what so ever from all my attempts. The product may be good, affordable and they claim a 10 year warranty. With no customer service or technical support what good is the product if you have issues?

I read for about 2 months online about adding a lithium battery in parallel with lead acid batteries and a lot of websites said don’t do it. I found a site about sailboats on the ocean using them and the guy had been doing it for a few years to add longevity to his LA batteries. I decided to try and added this to my RV with two 85 AH LA batteries about three months ago and couldn’t be happier. We like to boondock a lot and the LA batteries just couldn’t handle the fridge which runs on the solar and was draining our batteries after about 6 hours with full sun. I added this battery on the backside of the other two to work as a equalizer to keep the others charged while working hard. It has worked beautifully. We have boondocked a few times since then and the lowest our batteries have got is 12.3V. I used to start the generator at night also and have not had to do that. I have consistently tested these batteries since there was so much negative feedback about running them with LA batteries and they have been consistent at 13.5-13.8v. I know lithium is made to charge higher but everything I have read says keep them at 50-80% which is inline with what LA batteries stay at when charged by your RV. I guess I will see how the winter goes but this has been a great addition and has done exactly what I wanted it to do.