ECO-WORTHY 2 Pack Portable 12V 20AH LiFePO4 Battery, Lithium Deep Cycle Rechargeable Battery, Built-in BMS, 4000+ Cycles,Perfect for Outdoor Camping Fishing Marine Trolling Motor Fishfinder RV

I’ve build a small battery pack for my Jeep using 2 of these to double the amp hours. I’ve been pleasantly surprised at how well they work. I use a 13.1v detector from car batter that turns on to charge this with a dc charger while driving and then i use 12v pigtails to connect to devices to charge or power from these batteries. When i turn off my car and primary battery drops below 13.1 volts the dc charger turns off and these power 12v appliances while parked. As they go on sale i may double up the pack. I also used one to power my fish finder on my kayak. So many uses for these little devices and the built BMS seems to handle the TX heat and mountain cool air in handling charge/discharge cycles.

Works really well. Used it with my FT 991A on SSB and FT8. I used it for 6 hours, constantly transmitting at high power and still had ~25% charge left after using. Works with a bunch of different connectors and easy to carry. Great value when it goes on sale. Feels more protected than EcoWorthy's other 20Ah battery.

Price is great and long lasting power for my ft891 ham radio

UPDATE: Was contacted by vendor 11 months after purchase and shortly after my post here. They were concerned about my issue as reported. After several emails back and forth they have sent me a replacement; I received it yesterday. Their customer support was excellent and very friendly. I explained my situation and process and they were not hesitant at all to offer a free replacement. I am bumping my initial rating up from two stars to a full five stars largely due to the customer service and the replacement sent eleven months after purchase. ORIGINAL POST: ... Perfect size and fit for go-to box to power ham radio gear. Sad part is shelf life is terrible. Used three times over past 10 months and had to recharge from 0 volts each time. My other 7.2 Ah backup maintains a perfect full charge over same period. Very disappointed. I may have gotten a bad battery with an internal parasitic drain, way past return window.

I use this battery to charge the flight battery in my F5J RC contest sailplane. Instead of connecting my charger to my car battery as I used to do, I connect it to the Eco-Tech battery. It's small, lightweight, easy to handle and provides plenty of power for multiple charges. The only downside I'm concerned about are the two exposed terminals on top of the battery. I worry that in handling the battery around metal hand tools something can fall or be placed such that it contacts both terminals. The resulting short circuit discharge of such a high energy density battery would be spectacular and possibly dangerous. I put electrical tape across the top of my battery to cover the terminals once I charge the battery as a simple fix. A much better solution would be a plastic cap that snaps over the terminal with a cutout for a terminal/wire connection.

Excellent 20 ah battery. So much so, I bought this(the second) unit

I have 2 of these for an inflatable fishing boat that I can mount a small motor on the back. I get a solid 3-4 hours of none stop power and once the first one runs out, I switch to the second to head back. I charge them with some small solar panels, which does take several hours but so far the system works great!

Exactly as described. Haven't used it yet. But I will as soon as my radio shows up.