ExpertPower 12V 100Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | Bluetooth | 2500-7000 Life Cycles & 10-Year Lifetime | Built-in BMS | RV, Camper, Solar, Trolling Motor, Overland, Off-Grid

Update 4/29/2021 The battery is performing well. We made a trip to Florida to visit my parents which included one night without hookups. The DC to DC charger works great and the battery is not having any issues with performance. I was thinking of adding another but the reply I got was not to do so if the age is greater than 6 months. I guess I need to save for the 200AH model. Update: 6/22/2020 We still have only had short opportunities to use this battery since our trip to Alaska has been pushed back to next year. That was one of the main reasons for purchasing and installing this battery. However, I am still very happy with it. I did have to make some changes though. First, I realized that the tow vehicle could not charge the battery when I noticed that it was lower after towing than before. Two days of towing took it down to about 70%. This prompted me to purchase a Renogy 20A DC to DC charger and to install a battery isolator relay in the Frontier we use along with a dedicated circuit to power it. Now I can be confident of properly charging the battery while towing. Please be aware of this if you purchase one of these or a similar LiFePO4 battery as the 12V circuit running through the trailer connector cable is not suited for proper charging. It would probably be okay for short hauls, but not multi-day trips, especially of one is planning on off-grid camping. I also purchased a 100W Renogy solar suitcase to use if we are off-grid. Between the generator, the tow vehicle, and solar, we have three ways to charge the battery so I think we will be okay for off-grid camping. Original review: I purchased this battery to take the place of two 6V GC2 batteries I have used since December, 2015 in our camping trailer. By specifications, the GC2 batteries have more power, but since they are Lead-Acid, the best practice is to only discharge them no lower than 50% state of charge. The 215AH becomes only 107.5AH. To get that, it meant carrying about 120 lbs on the tongue of the trailer. Comparing specifications, the ExpertPower 100AH LiFePO4 battery can be discharged much deeper without damage, which means that the 100AH is almost completely usable. Also, the LiFePO4 batteries do not build up explosive hydrogen gas which means I could relocate it to inside. The compact size and the fact that the battery weighs only 29.7 lbs means that my useful cargo carrying capacity is now greater than with the Lead-Acid batteries since I save about 90 lbs with the LiFePO4 battery. I had previously built a compartment inside in a place where wires were that was otherwise wasted. This looked to be the ideal spot to put the battery. It had easy access, both to install the battery and to run the wires needed. I also opted to install a battery cut-off switch (relocated from the old battery case) and a battery monitor that will act similar to a fuel gauge in that it monitors amperage in and amperage out and calculates the state of charge. This is needed because a simple voltmeter won't work. The way LiFePO4 batteries discharge is that they have a rather flat discharge profile until they get low. Then voltage drops off rapidly. Beside the battery monitor, I needed to change the converter in my trailer since a lead-acid battery charger requires a different method of charging. We have a WFCO 8955 power center. WFCO makes a replacement converter that has the correct charging profile for LiFEPO4 batteries, WF-8950L2 MBA. One could get by with getting a stand-alone charger and not connecting it to the converter if that suits the installation better, but for us, this was the better option. I also probably could have gotten by with 6 gauge wire, but opted for 4 gauge because of the length of the run from the converter to the battery location. It will keep the voltage from dropping too much through resistance and be that much safer. The specification state that I can expect >2,500 discharge/charge cycles at +20C 0.2C (which I take to be temps between 20C and .2C or 68F and 32.4F) if discharged 100%. If only discharged to 50%, the expected number of cycles increases to around 7,000. Even the lower figure far exceeds the expected life of lead-acid batteries. ExpertPower states an expected 10 year life. Things to watch out for: Operating temperatures for discharge are -4 to 140F and charge 32-140F. Storage is between 32 and 86F. That is another reason for moving the battery inside. I can control the temperatures better when it is inside. Because LiFePO4 batteries have a very low self-discharge rate (approx 3%/month), one can charge the battery, disconnect it, and store it for a year at 77F and not damage the battery. The bult-in Battery Management System serves to protect the battery if conditions go outside safe specifications. I have not had an opportunity to really put this to the test yet as it is winter and we won't be using it much until later this year. However, this seemed the best time to purchase and install it. I will update later after we gain experience with it and I can better report on how it performs.

2nd UPDATE June 26, 2020: Chiming in once again as I purchased and received a few days ago the 50ah LiFePO4 battery. This is in addition to my previous purchases of two 100ah versions and one 20ah version (see reviews below). I now own four LiFePO4s from Expert and they're all performing great! I'll likely be back for more, finances permitting. UPDATE May 7, 2020: In addition to my previous purchase of two 100ah batteries (see below), I just purchased a 20ah LiFePo4 from Expert Power for a small portable battery box I built. Same excellent performance as I reviewed on the 100ah models. Lightweight, quick charge, and full capacity/amp hours. Very happy with this purchase! Purchased 2 of the 100ah LiFePo4's for emergency use, mainly to power my 2 12v portable refrigerator/freezers during power outages (hurricane area). But occasional boondocking as well. These babies are awesome! Passed their capacity tests and actually exceeded their listed rating. They run my 12v fridges for days. And I don't have to worry about exceeding 50% depth of discharge like with deep cycle lead acid types. I get the whole 100ah's! The recharging rate of up to 50 amps blows lead acid out of the water too. With my Progressive Dynamics 45amp lithium battery charger, I can charge these from zero to 100% full in just over 2 hours! Customer service was outstanding as well. Had several questions and even if I went to voicemail, Bryan there was always quick to call back and went above and beyond in helping me out. Also, if you're looking for a battery box for this 100ah, this Attwood model is a perfect fit: https://www.amazon.com/attwood-9067-1-Power-Vented-Battery/dp/B001O0D6QK/

This deceptive company, does not supply good data specs and product limitation, on the front end of their dealings. However; when these cheap China batteries begin failing, they are quick and very experienced at reciting their list of excuses as to why their cheap product continually fails . Since we install solar systems around the country, we continually are looking for new cost effective products. However. with the failure rate of these12v 100ah expert power batteries, we can no longer recommend them to our customers!! This has been our experience with this company. you might look into: Battle Born lithium batteries, Dakota lithium batteries, or KilolVault lithium batteries all three give good and complete data on their spec sheets and all three work in 24v and 48v systems. Whats more is when you are done with your purchase, you will have something of lasting value. Just wanted to share my experience, so you are not hung out to dry!!!

I was looking to replace a 200 aH AGM battery for a 1/3 HP basement sump pump that had failed after 12 years. AGM batteries can only run down to 50% of capacity so you really get 100 aH of useable run time. In researching replacements, I came across these LiFePO4 batteries that are much lighter (30 lbs vs. 130 lbs) and therefore much easier to handle. They also theoretically can run down to 10% of capacity. I looked at several brands and ExpertPower seemed to have the best combination of price, support and user reviews. Battleborn had higher ratings but were 25% - 30% more expensive although they have a 10 year warranty vs. the 1 year for ExpertPower. I figured like with most electronic products, problems are likely to occur in the first year. When I received the battery and corresponding charger from ExpertPower, the battery was shipped with only 50% charge. It took a while to fully charge up (3 - 4 hours) and I contacted ExpertPower after 2 hours of charging to see if it was normal to take this long to charge. They responded right away and I spoke to someone who explained the charge process and was very knowledgeable. The battery charged up fully after that and then I did a capacity test by connecting a 100W incandescent bulb. The theoretical capacity of the battery based on 90% usable capacity and 90% inverter efficiency is 100 aH X 12 V X 0.9 capacity * 0.9 Inverter efficiency / 100 W = 9.72 hours. I roughly timed mine at 9.5 hours which was inline. I then hooked it up to my sump pump and the inverter ran the pump a few cycles with no issues. I had to modify my inverter (Tripp Lite APS1250) to disable it's charging circuit because the charging profile for these batteries is different from AGM or Wet Cell - you might reduce useful life or damage them with the wrong charging profile. Also, ExpertPower said the self discharge rate is very low so if I don't have a power failure and run the pump often on battery, I should not leave their charger always connected and only recharge or top up the battery every 3 - 6 months (or perhaps before a forecasted storm event). Based on the price and tech support, I highly recommend this product. I have only had the unit for a week now and will update this after some time has passed, or I have gone through a prolonged power failure that resulted in my sump pump running on this battery for an extended period. Currently, if you register the product within 30 days, ExpertPower will extend the warranty to 2 years total

Bought this with the expectation that it would outlive a deep cycle battery I had. Seller claims “ 4000 to 7000 cycles & a 10-year expected lifetime”. I purchased in 2021 and the battery died in 2025. There is no way I’ve gotten that many charge cycles. Contacted seller who said there is only a 1-year warranty and gave me a link to buy a new one.

UPDATED: Zero problems from Sept 2020 until Aug 21. Performed great. Went dead suddenly. 100 AH battery. The only thing different that I did was to hooked it up to my camper from my Test Project. 1-day it turned off. Could not get it to charge. BMP off. I was really stuck in the woods. Had an alternator to charger, nothing. Fast-forward to TODAY. Expert Power told me to use a newer battery charger with "force mode" and this should re-set the BMS. I have a NOCO Genius 10. It has the "force mode". It worked instantly to reset the BMS and started charging. I followed the video from NOCO on this force mode for the Genius 10 on YOUTUBE. Easy. "Poof", worked. My test project was 1x 100 AH of a 400 AH build-out at Year 1 of testing. Now I need to test this battery a bit longer than 1-day back in action, but I feel a lot better now before I bought the 4 x 100s to finish the small cabin build! Lights are on. Good luck everyone! Old review pieces.....I loved this battery (100 AH) out of the box, Sept 2020. Before I bought several, I wanted to test LiFePO4 in my real-life needs. The battery performance was better than expected. RV use and small-shed/camp low demand load uses. Low temp shutoff worked flawless. Charge reasonably. Light weight is awesome. .......This was a 5 star buy until this need-to- have-it work for real and on vacation moment. I even wrote #1 on the battery top with a date because I figured I need many of these and want to see how this one performed as I would record performance with this test purchase. Of course, not even close to the low-end of the life-cycle. Bummer and now pain, never a good outcome with the first try. Good luck with your purchases replacements and builds. I am still a big fan of the lithium option! ....I will posted once more on the outcome with EP on the dead battery.

This is my second ExpertPower battery and no issues so far, the light weight is much appreciated in my application. The BMS works and I have put it to the test, but I wish there was a way to reset it without having to connect a charging source. My inverter is 1500 watts which is beyond the capability of this battery, so every once in a while I over current the thing and can't get it running again until I connect a charging source. I suppose over time I'll know what it can and cannot run.

I Installed two of these in my boat for use with the trolling motor to replace the AGM's. The old ones lasted maybe 4 hours and these lasted 6 hours on the first outing. I'd have fished longer but I already had my limit. When I looked at the trolling motor remote it still showed a full charge. So I'm not sure how many hours I would get but so far I'm extremely pleased. As a plus they are so much lighter than the old type. Much easier to handle. Maybe less expensive ones would give me the same results but I didn't want to take the chance. A definite 5 stars from me!!!