HW 12V Lithium Battery 12Ah, Rechargeable 12V LiFePO4 Batteries, 6000+ Deep Cycles, 12A Built-in BMS, Low Self-Discharge Rate for RV, Power Wheels, Fish Finder

Excelente

Whether you're looking to power your kid's toy, auxiliary power for camping, or trying to put together a UPS, shopping for batteries can be a pain. While putting together your own UPS might require reliable specs, more so than toys or camping, everyone should feel it's reasonable to receive what a seller claims in their ad. In a nutshell, this battery nicely ticks all of the boxes. So, let's get to the deets!The battery arrived holding 13.24V, which is pretty typical. It received a full charge and I let it sit for 30 minutes before load testing. .2C test performed, which basically means you attach the battery to a load equal to 20% of the rated amp hours, which in this case is 12Ah, thus 2.40 amps. This battery did very well. There shouldn't be a steep curve in the discharge. Still, here's the hourly breakdown, so you can see exactly how well this battery held above 12V.The results over the five hours:At start, no load voltage settled at 14.3, connected to test equipment and within 5 minutes, voltage settled to 12.9VHour 1 - 12.8VHour 2 - 12.8VHour 3 - 12.7VHour 4 - 12.5VHour 5 - 12.0VAnd beyond - Voltage dropped to 11.9V at 5hr 10min. Since there's a BMS (battery management system), I always let the test run so I can confirm the over-discharge function is working. The battery continued to provide power for an additional 30 minutes. The manual shows the over-discharge limit is set at 10.4V, however the BMS cut off at 11V. I have no issue with this. Battery protection is in place and functioning, which will contribute to longevity and prevent some of the irreversible damage that can happen in this type of battery. As expected, the voltage dropped from 12.0V at 5:10 to 11.0V at 5:30.Test was completed at 63°F, roughly 17°C, and the battery stayed cool to the touch. Beside the over charge and discharge functions, the BMS also provides over-current and short-circuit protection and high and low temperature protection. I don't experience the temperature extremes where I am, so I don't test for them. The user manual provided is quite good. I'm including a picture of a page showing my test matches the manufacturers curves.I'm glad to own this little power source and will put it to good use in a portable UPS I'm building. The price at the time I ordered it was $44.79, which is very close to what I see it's selling for at the moment. That's a mid range price for a 12Ah 12V LiFePO4, but it's actually pretty inexpensive for one that ticks all of the boxes, so it's a definite 5 star value, from my perspective. I have no way to quickly test the claim of 6,000+ discharge cycles. That puts it in the range of 10+ year batteries. Good stuff.* Note the picture showing the test equipment shows the voltage at the start of the test. Both the multimeter and the load device read 12.9V, but the LED display pulse makes it difficult to capture what the eye actually sees, which was 12.9V and 2.40 amps.

Would have easily given 4 or 5 stars if I had only purchased one battery instead of two. 1 of 2 batteries has worked flawlessly as I have tested my theory prior to this review. # 2 of 2 has shut down due to its ( BIM ) which is it's on board safety monitoring system. ( BIM = BATTERY MONITORING SYSTEM ) Based on 3 times which i have personally tested. Mfg's are fairly smart , or so they think. Once the onboard system detects a so-called issue it reverse the battery in-operative until the condition that triggered the alarm corrected. Eg : 1 of 2 batteries used in the O.E.M product manual for a series connection. In this type of connection , It would fault out every and anytime one of the batteries show any deviance in battery voltage of one another. A poorly designed and possibly as simple as a poor calibration of the two batteries which if used in a series connection should have been given a much much more scrutinizing calibration process. Enough said.

Reviewing: 12V 12A BatteryI work from home and rely on my battery backup to provide power for my router, monitor, phone and network equipment from failing me during those momentary power losses. When my UPS advised it is time to replace the battery, I decided to swap out the Lead acid battery to a much higher capacity Lithium LiFePO4 battery, giving me 4x more runtime than I ever had before. Previously with my old lead battery when new, I got roughly 7 or so minutes. With the new battery, I got 29 minutes so I am extremely pleased. Anything lasting that long, I can either start my Generator or drive into the office with any lengthy outage expected. On the plus side, when this battery is plugged into the UPS, it doesn't get hot like my old battery did. Would definitely recommend switching and upgrading to the HW LiFePO4 batteries in the UPS's for better runtime and reliability!

I don't have a whole lot of tools and gauges with which to test this battery, but I've charged and discharged it 3 or 4 times now and used it seems to perform sufficiently well. I decided to test it on one of my Christmas trees to power several strings of LEDs. LEDs must pull more amperage than I thought because the inverter I was using with it shut off the power after an hour or less as the voltage had dropped down to past the shut-off. I was probably running 5 strings of lights and the little fan on the inverter itself so I'm sure that chewed through the small battery capacity pretty fast. I was originally thinking of using this to power a mobile 2-meter radio from the middle of nowhere but now I'm thinking I probably should have done a little more research on how much capacity is needed before grabbing this battery.All that being said, it seems to function just fine.

Battery performs very well. Much lighter than the 7ah lead battery it replaced.The battery powers the fish finder on my kayak. I had no problem fishing tow 8-hour days with power remaining.Great purchase.