Dumfume 2-Pack 12V 314Ah LiFePO4 Battery with 200A BMS 15000+ Deep cycles | IP65 Waterproof, Low Temp Cutoff, 4.01kWh Energy, for RV, Solar, Off-Grid, Campers, Marine

These batteries have NO Bluetooth or temperature protections - but these "missing" features are made up in low cost. I have add on devices for protections. There are FOUR in PARALLEL in my bank of 12.8vdc @ 400 Amp Hours. I use a generic Amazon, robust 60 Amp Solar charger fed by 700 Watts of Renege N-type Solar Panels (3 200 W N-type + 100 W N-type) I live in the deep woods of the rainy Pacific Northwest in a clearing. My N-type panels provide adequate charging 80% of the time (supplemented with a gas gen feeding a VICTRON 30 amp 120vac charger. I've accidentally run the batteries to near zero and recharged them with NO adverse effects. Now a Renege Smart Shunt with remote panel has stopped over charging and discharging. The batteries live under my bed with a heat vent in Winter and A/C hose in Summer. VERY reliable and cost effective.

I like how the 2 bolts and 2 washers do not separate which makes it very easy to change out. Very light weight for me. With the handles you can easily pick this up with one hand. I used this battery for about 10 full cycles and it charges to 14.4 or 14.5. Warning!!! before using LifePO4 batteries, know how they differ from Lead Acid Batteries. You can kill LifePO4 battery by discharging it and leaving it in the cold. Also, need to understand the BMS. For example, the BMS will shut off the battery after discount for 30 minutes before allowing you to charge it. I later bought the Dumfume 12v 300ah and just started using it.

Have used them for a while, they are doing good, one of the BMS shut down for an overcharge I suspect using a solar controller, just disconnected & reconnected and the BMS kicked back in. Using 4 batteries in series for 48v service, saved wire size.

With a few cycles from new to 14.6 v then to 11.6 v , the battery produced 105 amp hrs ( 5 amp hrs beyond advertised) with a constant 9.5 amp draw verified by a Powerwerx type digital meter. Impressive. Its very important not to leave the battery fully charge, rather draw 30-40 amp hrs out , then it can be stored. It came packaged well with a very rigid box and foam. No high amperage draws were performed . The two side carry handles showed no sign of fragility . Overall at least new it seems like a good buy.

This has been a solid solution. I've been using a pair of them to power my diesel heaters this winter without problems. I have four 100w solar panels and have experienced zero issues. I contacted customer support with questions and received a prompt and well informed reply. Good product, good company. A good value.

I bought two 12V 100Ah batteries. One works, the other one won’t charge at all. Same charger, same wiring, so it’s clearly a defective product, not my setup. It stay at below 12v and it mean it can’t charge!! Very very bad customer service!!! Try to exchange the bad one.. it took me more than 5 day until now still can’t do it!! On top of that, the item is non-returnable, and customer service just give a very difficult time. didn’t solve anything. In the end I basically paid for a dead brick. I won’t buy this brand again and don’t recommend it to anyone. It is a very easy problem and they make it so communicate!! Just an exchange took me like 5 plus days!!

Go to Dumfume.cn and read the warranty on the Dumfume web site. I thought I was buying from Dumfume and would be able to qualify for the 5 yr warranty by registering my battery, only to find out that they consider the Amazon Dumfume store where I purchased it to be third party and not warrantied by Dumfume. However the 600ah lifepo4 battery arrived fast and in as new shape, it came about 60 percent charged and took my charger about 20 hours to balance. It is at full capacity now and working well. I did get a fast response from the company after emailing them asking about the warranty, so perhaps if I had not assumed that I was buying direct I would have a 5 yr warranty.

Real world test! I put four of the 12V 100Ah mini batteries on my boat to make a 12Volt 400 Amp hour bank. The bank is now at -411 Amp hours and still holding 12.6 volts!!! The bank finally dropped below 10 volts at -460 Amp hours!!! The batteries hold a high working voltage (Greater than 12 Volts), even with a 10-20 Amp load almost to the very end. It's also supposed to have Bluetooth monitoring, but I can't figure out how to make it work. However,,, Absolutely NO WAY to contact the manufacturer for help!!! Website doesn't work and I can't see any way to contact them from the listing.

Cette batterie , montée pour alimenter la cellule de mon camping car me satisfait pleinement . pas de problème .

Very large, high capacity battery that represents very good value for money. Does the job of 6 x 100amp batteries which results in less complex wiring with only two terminals to hook up. Item was well packed and arrived very quickly.

Buen artículo, un poco caro, eso si

chargée 2 barre ....pour une 300 amp c juste pénible.....j espere qu elle va tenir la charge....

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