12V 8Ah Lifepo4 Lithium Deep Cycle Battery 2 Pack, 2000+ Cycle Rechargeable Battery for Small Solar, Power Wheels, Lighting, Fish Finder, Off-Grid Applications with Built-in 10A BMS
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Style: 12V 8Ah-2Pack
Features
- Excellent Performance: Sefepoder LiFePO4 batteries are made of high quality cells with high energy density, Long cycle life, Good safety performance, no memory effect, etc. The batteries are only 1/3 of the weight of lead-acid batteries of the same capacity!More safety and environmentally friendly than lead-acid batteries.
- Safe and Reliable: LiFepo4 batteries will not burn when overcharged, overdischarged, overcurrent or short-circuited, and can withstand high temperatures without decomposing, with built-in BMS protection against overcharge, overdischarge, overcurrent and short-circuit circuits. Can be connected in series or parallel, up to 4 identical batteries in series, 6A fast charge, output discharge up to 8A continuous and 3C pulse.
- Long service life: lithium-ion batteries 2000+ cycles no problem, while traditional lead-acid batteries only 200-300 cycles, no memory effect, no matter what state the battery is in, a charge can be used.
- Wide Applications: Widely used in most fields, such as:lighting, 12V router, RV/outdoor camping, riding toys, RV, power wheels, fish finder, amateur radio, alarm system, fios router, cellular camera,solar/wind energy, off-grid applications etc.
- What You Get:2*12V 8Ah LiFePO4 battery, 12 months warranty, If you have any q
Number of Batteries: 1 Lithium Ion batteries required. (included)
Brand: SEFEPODER
Battery Cell Composition: Lithium Ion
Battery Capacity: 8 Amp Hours
Recommended Uses For Product: Power wheel, Fish finder,12V router, Ride on toys,Lighting, Alarm system, Camping
Product Dimensions: 5.94 x 2.36 x 3.7 inches
Item Weight: 2.2 pounds
Item model number: SP1208
Batteries: 1 Lithium Ion batteries required. (included)
Is Discontinued By Manufacturer: No
Date First Available: November 27, 2021
Manufacturer: SEFEPODER
Country of Origin: China
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Top Amazon Reviews
Style: 12V 8Ah
I extended my 12v car battery with this. Despite the comments not to do it, a battery balancer costs anywhere upward of $200. So I made my own for under $10. I may be wrong in some assumptions, and am still testing my setup, and will update in the future on more actual results. In the meantime, I theorize: My lead acid car battery charges at 14.4V (11A), and discharges at 12.65V (800CCA). This battery charges at 14.4V (4A), and discharges at 13.35V (8A, 20A burst). I connected this lithium battery in series to a 100W 3ohms resistor. Then I connected the lithium battery + resistor unit to the lead acid battery in parallel. After about 60 minutes of driving, the resistor was slightly warmed up, but still less than hand temperature, and the Li battery was cold to the touch, and both batteries balanced out. The resistor was added to lower the balancing currents between both batteries, and to protect the Li battery from over charge currents. From online: A lead acid battery has an internal resistance average of 20 mOhms. A lithium battery has an internal resistance average of 100 mOhms. Assuming this information is correct, and if my charging circuit provides 10A charging current (which is on the high side), the lithium battery without resistor should charge at approx 1.6A, while the lead acid should charge at 8.666A. So a resistor may not even be necessary for active (being charged) operation. More than likely the actual charge current is lower, as the charging circuit may only provide 5 to 6A of charge current,thus lowering the lithium charge current below the nominal. With added 3 ohms resistor, the 14.4 charge voltage drops to 13.75V, as a further protection against shorts, overcharges and over discharges. The main 2 reasons I have the resistor installed is: 1- High current draw protection (eg: when the battery wants to start the engine, and a voltage sag happens). 2- Battery balancing when charger circuit disconnects. Number 2 is the main reason, as the 14.4V charge voltage over the lead acid battery (13.75V on the Li battery side after resistor) disconnects, and the Lead acid battery drops to its nominal 12.50V, and the lithium to its 13.5V. That's a 1V differential between both, and with only 20mOhms on resistance, the current draw of the Lithium trying to charge the Lead acid would be about 50 amps (ignoring wiring resistances, probably closer to 25A in real life), well above the max the Li can handle. With the 3 Ohms resistor, the current draw from the Li to the Lead Acid should be closer to 0.333mA. A better suited 1Ohms resistor should allow for balancing currents of 1A. The resistor isn't the most efficient way to limit current, but considering that it was a very cheap solution, IMHO it was the best solution for an average Joe. The cons of this resistor setup, is that after shutting off the car, both batteries will self balance for a time, until the 13.50V voltage of the Li battery, matches the 12.50V of the Lead acid. Consider that the car also has parasitic losses, drawing energy from the lithium battery first; and all that balancing and parasitic losses all go through the resistor which basically converts roughly 1 to 3W in heat loss.... The second con, is that when the starter motor is engaged, drawing up to 200A (400A peak); and the Lead acid voltage drops to 10V, the Li battery will be taxed heavily. It can provide a max of 20A for a duration of 3 seconds. If we presume that the LeadAcid has an internal resistance of 10mOhms, and the Li+3Ohms resistor is 3100mOhms, then about 200A/3110*3100= 199.35A goes to the Lead Acid, and about 0.64A goes to the Lithium (provided both batteries leveled out to 12.50V). If the engine is started immediately after it was shut down (start-stop system at a red light), the Li still has 13.5V, making the amp rating ~0.83A The rest of the power gets drawn from the lead acid. For that reason, I believe a 1 or 0.5 ohm resistor may be more suited for regular cars allowing higher balancing, and higher starter discharge currents. In my case however, I own a hybrid car, and the starter only gets power from the 12V battery, if the high voltage battery is depleted. So it basically never draws power from the 12v. So the Li battery is merely there to extend the life of the 12V battery, and take care of the parasitic losses of the car (sensors, remote unlock, etc...). So far it also seems to work just fine. I'll update when something goes wrong or fails.
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Reviewed in the United States on September 29, 2022 by H B
Style: 12V 8Ah-2Pack
Works fine in older Razor 24v 12" dirt bike, maybe a bit more power than original AGM. Wasn't sure if BMS would be powerful enough, but it hauled my 180lb body up a steep driveway, the motor struggled as it usually does, but the batteries didn't cut out. Also wasn't sure the original 24v charger would work, but it does. I do assume that one battery will reach 100% before the other and will cut out, leaving the other battery not fully charged, so I will periodically charge each separately. The weight difference is incredible. And hopefully won't be replacing these every other year like the original AGMs. I will likely be purchasing more for UPS's, to eliminate replacing AGM batteries! Testing the BMS while charging, I think they will work fine with a UPS, as they completely cut offline when fully charged. Not sure how much current they can actually output for a UPS though.
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Reviewed in the United States on May 23, 2025 by J. Bobay
Style: 12V 15Ah-2Pack
One of the 2 batteries in the 2-pack did not measure up to stated capacity, 12AH instead of 15AH. Once the problem was confirmed with the seller, they immediately sent out a replacement and that was confirmed at stated capacity. Excellent customer service and I will definitely buy from them again again if the need arises.
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Reviewed in the United States on June 17, 2025 by C. LIN
Style: 12V 15Ah-2Pack
With the correct sizes listed on the seller's site. Right fit first time. Just what i ordered. Thank you
Reviewed in the United States on April 12, 2025 by Placeholder
Style: 12V 15Ah-2Pack
Great value for two batteries. Easy to install when you switch out of the power wheels when they run down. Quality is better than other brands I’ve used.
Reviewed in the United States on June 13, 2025 by L. Robertson
Style: 12V 15Ah-2Pack
Very light batteries.
Reviewed in the United States on June 27, 2025 by Placeholder
Style: 12V 15Ah-2Pack
Why does it say 2 pack and only one battery showed up what the heck I thought 2 pack means two batteries
Reviewed in the United States on May 19, 2025 by james
Style: 12V 8Ah
Lead acid battery tripped the panel as it dropped a cell or two, bought this to replace it with idea maybe it'll last a while. I did have to clip the terminals to make them fit, but had to on previous so no biggie. Battery weighs maybe 1/3-2/3 the old battery. Being it's a lithium, slight worry but risk in anything...
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Reviewed in the United States on May 18, 2025 by jenksdrummer