Takki12V 8Ah LiFePO4 Battery, 12V Deep Cycle Lithium Iron Phosphate Rechargeable Battery, Built-in 8A BMS & 10-Year Lifetime Perfect for RV/Outdoor Camping, Fish Finder, Small UPS, Solar

I needed a power source that would easily run my (tr)uSDX QRP radio, along with a keeping a cell phone or tablet charged. This battery completely fills the bill. I designed and 3D printed a PowerPole hub that allows this battery to connect to the (tr)uSDX as well as to a 12v to 5v buck converter to power up a phone or tablet. I use the phone or tablet for logging contacts. When I received the battery and had the hub built, I connected everything and ran the little radio in CW mode for nearly 6 hours. Battery voltage dropped a total of 0.4 volts over that duration. I believe I could operate for 3 to 5 days without the need for a recharge.The battery will get used like this once every 1 or 2 weeks so we'll see how long it is able to keep up with the load it is placed under each time. So far so good!

After going through 14 different lifepo4 12v 6ah batteries, these were the only ones that worked for my razor crazy cart. The other cheaper lifepo4 batteries you can buy on Amazon, even though they say 10amp BMS, they kept going into protection mode as soon as I turned it on (0.02 amp load). I'm not sure what triggers it, but all the other batteries would drop voltage from 13v down to various volts(0v, 1v, 2v, 5v, 7v, etc) sometimes they would stay at 13v, but rarely. Also note, majority of the batteries I ordered, even though they were from different brands, they were all the same batteries(same packaging, manual, warning labels, etc). Only difference I could find was that they had a different brand label.These Takki batteries with 6amp BMS outperforms the cheaper batteries that had 10amp BMS.If you're looking for replacement batteries for your crazy cart, these lifepo4 last a lot longer than the SLA batteries they come with, and safer.

So, for the 12Ah, two runs from full charge to BMS low voltage cutoff have yielded 159WHr each time, exceeding the spec. I have not tested yet at full load but kept the load around 40w cycling to about 1w driving a refrigeration unit. Barring unforeseen circumstances, this appears to be a quality battery. The 6Ah did not fair as well with a pretty solid 70Wh or about 5.5Ah after multiple cycles with a load of about 3A cycling. A quick test of the 6Ah current delivery capability did show it to deliver 9A under a resistive load so it does appear the BMS can get close to the 10A rating. Still, not a bad battery, just a little bit under the 6Ah rating.

Lightweight and small. Works well.

Great quality. Has great battery life going to buy morw

I ordered this battery intending to use it in the field to power an astronomical telescope. My scope's drive system draws about 1-amp of 12v power to track the sky (earth's rotation). The power draw does have some variation if I slew it around to look at a multitude of objects, which increases the draw somewhat. I do not use the same battery to power dew-heaters, cameras or other electronics at the same time, just the telescope tracking system. The battery's 12 Ah rating should mean that it can power the scope for a night of viewing. Testing seems to confirm that. I have not determine the max amount of time it will run the scope yet, but no problem holding up for 4-6 hours.As others have mentioned, this Lithium chemistry battery does require a purpose-specific charger. I tried a couple of multi-purpose chargers that I had on-hand that are supposed to be LiOn compatible, but they did not work. After doing some research I tried an "Optimate" brand charger, which worked perfectly. I ordered one of those chargers which, gulp, cost about $135, but it does appear to work on virtually any LiOn battery.Size and weight of the battery are nice for field use, much much lighter than a Gel-Cell or Lead-Acid battery. It does what I want it to, but would caution you to make sure and match the battery to your intended purpose. There are several other higher capacity versions of this battery available from the same company.Pros: Small, very lightweight, constant voltage output, price is right!Cons: Needs an expensive charger.Really cannot down-grade this battery for needing an expensive charger as that is part of the price you pay for light-weight portability.