ECO-WORTHY US via Amazon [amazon.com] has
ECO-WORTHY 12V 20AH Portable LiFePO4 Battery w/ DC Output on sale for $75.99 - additional 25% off w/ code
25IYA883 at checkout =
$56.99.
Shipping is free.
Product Features:- Compact & Portable w/ Versatile Use: Powers camping gear, small UPS systems, kids' ride-on cars, fish finders, kayaks, and amateur radios, ideal for both outdoor and emergency use.
- DC Output Interface: Features traditional terminals and a 5.5x2.5mm DC port for standard charging, discharging, and powering USB devices
- BMS Protection: 20A BMS safeguards against overcharge, deep discharge, overload, overheating, and short circuits for longer battery life and optimal performance.
- Eco-Friendly Longevity: Lasts 10+ years and 4000+ cycles, outlasting lead-acid batteries (3 years, 300-500 cycles), offering higher efficiency and lower maintenance.
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9 Comments
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update: but there's 5%/10% subscribe and save - you could get it for under 50
Your car's 12V socket isn't a charger, it's a power supply. Technically (assuming the LFP battery's BMS has effective overcharge protection), you can charge an LFP off a 12.6-13.6V power source like a car - but it's not preferred, because you likely won't get a full charge. 12V LFPs prefer to be charged @ ~14.4V.
A lithium-compatible battery charger is what you want to properly charge an LFP battery like this. They have the smarts to 'know when to stop' (bulk/absorption/float charging phases). As an example, here's a fairly reputable one that will charge this from 0 to full in about 4h (and just about every other battery chemistry): https://www.amazon.com/NOCO-GENIU...B07W8KJ
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Your car's 12V socket isn't a charger, it's a power supply. Technically (assuming the LFP battery's BMS has effective overcharge protection), you can charge an LFP off a 12.6-13.6V power source like a car - but it's not preferred, because you likely won't get a full charge. 12V LFPs prefer to be charged @ ~14.4V.
A lithium-compatible battery charger is what you want to properly charge an LFP battery like this. They have the smarts to 'know when to stop' (bulk/absorption/float charging phases). As an example, here's a fairly reputable one that will charge this from 0 to full in about 4h (and just about every other battery chemistry): https://www.amazon.com/NOCO-GENIU...B07W8KJH44 [amazon.com]. There are cheaper options available, but I try not to refer people to dangerous 'trash' when it comes to things that can burn a house down.
But the cheapest batteries don't always pack the best BMS. That's the basis for having an actual charge controller for a battery, it's good for regulation - efficiency, and longevity / safety of the battery system, and for it to run well for a longer (helps with things like cell balance & health of the battery). Fed by either 120V AC, or DC via solar or otherwise. A typical car port will only support up to about 100W, which means you'd be liable to blow fuses just plugging directly in to a 12V cig. port. The car ones usually have a way to limit down to 8A or so for a max of about 100-120W.
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