Lithium Car Battery Start and Stop, 12.8V Group 47 LiFePO4 Automotive Battery For Car, Starter Battery, 36 Months Warranty

Installed without any problem. Dramatic difference in weight compared to lead-acid original battery. One click starts. Probably a way overkill in terms of cranking ability (almost twice the CCA rating). I understand that the Ah rating is effectively twice that of an equivalent rated lead-acid battery. Battery voltage remains almost constant until near full discharge. With lead-acid battery, voltage continues to drop during discharge. So the rated Ah is only partly usable because of low voltages. I have had a few of these LiFePO4 batteries in use since their introduction. The one failure I have had was in the battery management circuit. Only two were rated for high cranking amperage (as with this one), and those have been in daily drivers for 8 months, Hope this one will be just as good.

Initial Review: 2004 Subaru STi (group 26). Received battery yesterday at 87% charge, about 13.3V. My alternator runs about 13.8-14.0 at startup. I charged it for about half an hour while I tried to decipher the weird instructions that came with it. Ultimately just decided to swap the battery in a usual fashion. By then it was at 93% according to its own diagnostics, around 13.4V. Fits directly in without any modifications. It is feather light. Hooked it up. Car cranks a little faster than my tired lead acid battery, which was struggling to maintain 12V. Car started fine. Idles normally around 13.8V. The battery shows 100% at this point. Will have to see how this plays out over time. I drive this car rarely. Also the tires dictate no subfreezing temperatures. I have a battery tender that is capable of LiFePO4 chemistry, but I frequently forget to hook it up, so I'm hard on batteries. My garage is insulated but not climate controlled. So far I'm happy, and if this holds up, I'd never buy another lead acid battery. The weight savings are like getting 1-2 free horsepower, and it's taken from the front of the car. One more tip: get a 12V lighter USB adapter with a digital voltmeter. For like $10 I now have accurate voltmeter that matches my multimeter and has a USB-C outlet as a bonus.

I bought for my daughters 2008 VW Beetle and thought that new tech meant better! The battery build quality appeared very good and light weight. It installed easily but after driving it for a week, the car stared to have issues. The radio would turn off and restart randomly while driving and I did notice a hiccup in the car while driving. The alternator light would come on for a couple seconds and would disappear at the same time the radio comes back on. I do notice the headlights look dim while driving at night as well. The alternator is less than a year old and should have no issues. I do notice that before the battery swap, I was charging voltage was at 14.4V while on. With this new battery, the voltage charge dropped down to 13.4V while driving. After trouble shooting this with my mechanic, it came down to this battery issue. I had to replace this with the standard AGM and now the car works fine with bright headlights. It is charging back to 14.4V. I ended up return the battery. Not sure how everyone else is doing fine with theirs but my car did not like it or the battery was defective out of the box.

Extremely light weight. Starts car with ease. Accessory use doesn't drop voltage, whether car is running or not. On-board BMS charging circuit keeps battery fully charged and ready, whether taking short or long trips. Amazing for the price! BTW - I have an old car that used a Group 35 battery. This Group 47 battery is very close in size, and did the trick!

I put this group 24 in my Lexus LS400, it fit perfectly, the cranking speed is outstanding, the alternator charging 14.2 volts, amps initially was 30 amps from alternator, settled down to a little under 10 amps once the BMS learned the alternator output, after researching the high amp output from charging system. No problems at all with this last arctic blast. IF** you have a no start cold, turn on headlights high beams for 5 or so minutes THEN attempt cranking. It's counter intuitive to do that as we are used to LA batteries, lithium must warm up to get to robust large amp discharge. Current flow will warm the batteries.

Almost a drop in replacement for the dead H5 that was in my 2013 smart fortwo passion cabrio, and is working great after two weeks. So much lighter too - easier to put into the vehicle because it is so light. Exact fit - except it is not a true H5 battery because it does not have the two holes in the handle for the positive terminal cover. I drilled two holes for the cover and all is well. That said, the picture shows the holes and the battery I received did not have them. I believe that the items received should always match the pictures for the item being advertised. Oh - made in China if that matters to anyone. The stock charging system is operating perfectly with this battery - I have a Bluetooth battery monitor attached to the battery and nothing is not where it should be. Starting voltage is higher with this battery than stock, and it appears that the headlights do not show electrical load changes like the flooded battery did - I think the LiFePO4 responds quicker to load changes than the stock batteries. If any of this changes, I will update the review.

I received my GROUP 24 LiFePO4 battery yesterday and planned to swap out my dead lead acid with it. The LifePO4 came completely dead. Pushing the button displayed NOTHING in the round window. This is an unbelievably huge disappointment and hassle. I now have a dead Lithium battery to add to my lead acid one. There is no contatct info for support. I'm hoping Amazon will replace/refund this before the return period expires. I reserached this company online, and am totally bummed.

My car uses a group 101 battery, which is hard to come by. As an alternative, a more common group 78 can be used. Neither of these are available in LiFePo4, so I looked up dimensions and decided to try the group 26. It fit my tray OK, but I had to trim a piece of plastic on the car where the battery sits at the top rear of the battery, and then reroute my cables since the terminals were opposite. I used a pair of top-to side post adapters. The battery hold down worked with this battery. I wanted a LiFePo4 battery since I started using one in my motorcycle. It can sit for over a week and still start right up. It showed as 85% charged upon delivery. I used a Noco Genius 2 to trickle charge it overnight, which brought it up to 100%. I've used this about a week now and am pleased with the result. If it holds up, it will be nice to avoid buying a battery about every 3 years. The lighter weight is also a plus. Update- The LiFePo4 battery in my motorcycle can sit for weeks and start the bike right up. It's a modern bike with a slight parasitic drain. I was upset when I got in the car after a couple of weeks only to find the battery apparently dead. I tried pushing the silver button and it came back to life- 12.2V on the display and the car started. I suppose this is some type of safety mechanism, but it's inconvenient. Reduced to 4 stars.

Perfect fit for a 2025 Corvette Z06. Works awesome.

Awesome packaging, great product and my god is this thing light!! It’s great as my 2nd battery as the after market holder isn’t the sturdiest I find. It would probably make a great battery on its own, but I needed the extra juice when I plow. So this will be perfect!