12V 6Ah LiFePO4 Lithium Battery Universal LiFePO4 Lithium Battery 4000+ Deep Cycle Rechargeable Battery with Built-in 15A BMS (12V 6Ah)

Good quality battery, puts lead-acid and LI-ion to shame in overall performance and longevity. I bought four of these to build one 24Ah battery for my motorcycle, gutted these cases, stacked them and securely soldered all proper ga wiring to result in an impressive larger bike battery for the price that fit perfectly. Power output is consistent, strong, and virtually unaffected by freezing winter temps. No more worrying about electrolyte spills or freezing, and will run my sound system for quite awhile without the engine running, or worrying about starting again.

I originally ordered 2 of these to attempt to replace the 24v batteries that had failed in my UPS. This did work with 2 in series, although the estimated run time and battery status wasn’t very accurate. I don’t fault the battery at all since it’s due to the way LiFePo discharges vs what the UPS is expecting from the previous lead acid battery for its calculations. Due to this I don’t think I will use these in a UPS application and keep them for other 12v projects. The battery is super lightweight, so nice for projects that are portable. I did a test by putting a 1A load on the 120v ups and it lasted for 1hr 10min. The batteries were in 24v series, which is right at the runtime I’d expect from them. Overall, I think the case construction is good, Ah rating is accurate, and it’s super lightweight. I’d much rather keep these around vs the old heavy batteries I used to use.

I wired up the battery to use as a small powerbank and also a flash light using a plastic ammo can from Harbor Freight as well as some wiring harnesses with fuses i had lying around and some old off-roading lights. Battery works great but not big enough to jump start a car just a head’s up. Worth every penny and hasn’t let me down so far.

I just installed and tested the batteries in an APC Battery Backup. They seem to operate correctly, however, the terminals are nearly 3/32" more narrow than the Lead Acid terminals. I had to bend the terminals outward to get the mounting bracket to fit.

I’ve wondered about using a lithium battery to resurrect a dead UPS. I’m of an age where time flies and lead acid batteries seem to go out in no time. The lithium battery (specifically the LiFePO4 battery) has a better usable capacity than a lead acid battery of the same watt hour rating. This should be offset somewhat by the Lithium battery not charging fully because the UPS runs at a voltage optimum for lead acid and not the higher voltage needed to fully charge a Lithium battery. Because the Lithium batteries can withstand several times the number of charge cycles that the lead acid batteries can, I’m expecting to get longer life from it. That’s going to improve reliability and last enough longer to pay for itself. That’s all fine and good in theory and only time will tell. What I can tell you now is that this battery fit into the space occupied by the lead acid battery (it’s a tight fit for both of them) and from all indications is working just like the original battery. I plugged my Starlink receiver into the UPS and we will see if we can make it through a short power outage without losing internet next time it happens. I have other UPS boxes that could use this upgrade if it works out.

Consistant output, no complaints

Came with decent instructions, which is nice. Listed "max charge rate" as 6 amps, and regular charge rate at 3 amps (1/2 C). Put this on my charger, set it for LiFePO4 mode (4C) and hit "Start". At 3 amps, it took somewhere around 2 hours from "shipping charge" to max. I don't know the exact time, because the built-in BMS circuitry disconnected the battery from the charger before the charger itself detected "100% full", which clears my charger's timer. But, this is also a good sign, as it indicates the BMS circuitry is, in fact, working as it should. Charging was uneventful, with no errors or overheating evident. The price is even fairly competitive for LiFePO4 batteries in this class. All in all, this performed exactly as expected. Sometimes even a coupon is available which makes it an even better deal. 5 stars.

I got this to replace the battery in a UPS(Uninterruptible Power Supply). The problem is that the charge voltage to what was an AGM battery is only about 12.8 volts. These batteries require 14.6 volts to charge, as they have an integrated BMS. That means the battery is not charging. I tested this out by unplugging the UPS from the mains, and letting my PC run from the battery backup for a few minutes. I plugged it back in, and the battery monitor showed a 25% charge loss on the battery. A few hours later, it still showed a 25% loss of charge. I don't have a 14.6 volt charger, so, this battery is sitting unused until I buy one. I replaced the battery in the UPS with another AGM and it is working as expected.