4 Pack ExpertPower 12V 10Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery | 2500-7000 Life Cycles & 10-Year lifetime | Built-in BMS

A GREAT 128 Watt Hour battery! This is a better capacity than a comparable lead acid. However, care should be taken not to exceed the max discharge current or max charge current or Max Surge for 5 sec.. Max discharge rate for this battery is 10A. If possible to keep at or below this, a much better choice than a lead acid battery. If you need higher discharge rates, lead acid is a better choice.

Good quality product. Worked better than expected.

These were both dead right out of the box. I put them on my Liftmaster gate system to replace my lead-acid batteries that were going dead; after a week of non-use, charging on the solar panel, these did not charge. Pictures are of me checking one of these (blue batteries) with a voltmeter, and testing one of the old (black) batteries. The old ones, which need replacement, still tested at 5 volts, proving that the test is valid (I also tested a 20 volt Ryobi battery and it measured correctly). Using the exact same test, the blue batteries measured 0.05 volts…that’s 1/20th of a volt! Then I read the questions, and they said you needed a special charger…so how would they recharge off of a solar panels like my lead-acid (sla) batteries did? The answer to another question was that you had to buy their 2 amp battery chargers. So these might work for some applications, but definitely not gate batteries. I sent them back.

I purchased these ($50 less than oem) to replace the lead acid back up in my ups. They charge completely (bms worries) and have the same accumulated voltage (27.2). I did an offline test and they passed. Time will tell.

I bought 2 of these batteries to build a back up power supply for two applications. The first was to run my small QRP ham station in a box that was intended for use during hurricane season here in Florida and the second was to power my cable modem when the power went out (happens a lot here in Florida). The batteries, installed in a plastic box, (purchased from Amazon) worked excellent for either purpose. However, one day, they simply stopped working. (zero output) While unsure of the actual failure I suspected I had shorted them our during charging and felt sure I now owned two bricks. I sent a note to the company and during a long series of exchanges i found that the built in BMS likely went into a safety mode and if I put a small charge at 14.4 VDC i might recover them. Sure enough the Batteries came back to life and they work perfect. I sure never expected that .... I asked for and received the specifications for the BMS. After reading the specs and further discussions with their tech in California I found there were numerous protections built in and the price for the batteries is very justified. Definitely would recommend them.

Perfect! Takes a charge very well. Would definitely recommend.

Bought two batteries; are working well. Charger quit after three uses.

I had to use "fillers" to take up space inside the battery-pack. The batteries work well and are MUCH less heavy than the gel batteries.