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Miady

Miady 12V 36Ah Lithium Phosphate Battery, 2000+ Cycles LiFePO4 Replacement Batteries for Solar Power, RV, EV and Marine Applications

    • Based on 1,170 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Miady
Arrives Friday, Feb 7
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Size: 12V-36Ah


Features

  • 2000 Charging Cycles - Lead-acid batteries last 100-300 cycles is a lot more typical while lithium-iron batteries will go 2000 cycles with no problem. If being used daily, an AGM will need to be replaced approx. 6 times before the LiFePO4 needs replacing. Lithium batteries can be fully discharged without risk and without loss of future capacity as well
  • Flat Discharge - LiFePO4 technology gives a very flat discharge curve which means sustained power to the end of the cycle. If you are powering lights they will remain brighter for longer, giving you sustained performance
  • Specification - Voltage: 12v; Amp: 36Ah; Dimension: 6.4*4.9*6.8 inch (L/W/H); Weight: 4.31kg/9.5lbs
  • What You Get - 1 * Miady 12V 36Ah Lithium Iron Phosphate Battery and 18 months hassle-free warranty. 24*7 friendly and professional customer supports. (Battery charger is not included)

Description

2000 Charging Cycles - Lead-acid batteries last 100-300 cycles is a lot more typical while lithium-iron batteries will go 2000 cycles with no problem. If being used daily

Brand: Miady


Size: 12V-36Ah


Automotive Fit Type: Universal Fit


Manufacturer: Miady


Manufacturer: ‎Miady


Brand: ‎Miady


Model: ‎LFP


Item Weight: ‎9.48 pounds


Package Dimensions: ‎1 x 1 x 1 inches


Country of Origin: ‎China


Item model number: ‎36Ah


Batteries: ‎1 D batteries required. (included)


Manufacturer Part Number: ‎Miady


Amperage: ‎36 Amps


Date First Available: May 31, 2023


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Feb 7

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

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Top Amazon Reviews

    • Good battery for low power radios.
You can use this for multiple purposes, but I use it for a 20 watt HF radio, a Xiegu G90. It's worked for 4 hours of continuous use, although I've not completely drained it. Do not store this in temperature extreme environments as it may damage the battery or prevent proper charging.
Reviewed in the United States on December 26, 2024 by Justin P. Reese
    • [Update: please read!!] Had three batteries die after just one discharge
So I previously trashed this product in a similar way to the other 1 star review due to my lack of knowledge on how these batteries work. These batteries have internal battery management systems (BMS) which cutoff the current at 10V and cause the batteries to read 0V. I was under the impression this was either a "recommended cutoff" on the datasheet or the BMS would cut the current and then restart a moment later like many other BMS's do. When looking online, many people stated the drop to 0V was part of the protection circuit and was permanent: This isn't true! These batteries are designed to go into a sleep mode when they reach 10V and will wake up when voltage is applied from a charger. This is actually an incredibly useful feature for my application of using these as a portable power bank for heated motorcycle gear. I no longer need to worry about over discharge. I can just let the internal cutoff activate if the cells get too low (obviously this isn't preferred, but will work in a pinch if I run the batteries longer than normal). Now here's the issue: The charger I'm using, which is a smart charger for sealed lead acid (SLA) and Li Ion batteries used in cars, needs to detect the voltage coming from the battery to turn on charging. As a result, it does not send out any voltage of its own and will not wake up a sleeping battery. To turn the batteries back on, I VERY quickly tapped a 9v battery across the terminals of the battery (another 12v battery would have been better), positive to positive and negative to negative. This supplied the needed voltage to wake up the BMS and allow the 11.2 or so volts remaining to be present on the terminals once again. Now my smart charger could detect the battery and charge it like normal. Yes, the battery had 11.2V when the cutoff is 10V. This is not a defect in the BMS, rather, the voltage will sag under load to 10V, the cutoff will activate, and when the battery is woken up it will once again read the non-sagging "open circuit" voltage as there is no load any more. Overall I'm very happy with the 3 batteries I bought which arrived with identical voltages, perfect for parallel configurations. They have more power than I was expecting and should easily run my heated gear for 2+ hours on max heat. Being able the use a standard SLA charger and having an automatic low voltage cutoff makes these a versatile power source for many projects. Just make sure you have a way to "wake up" a battery that has reached the low voltage cutoff; either another battery or a non-smart charger. Here's the result of my discharge test for those who are curious about how much power these have. I'm using 3 batteries in parallel for roughly 18Ah of capacity (Series configurations are not recommended without a BMS, and even then, these batteries have internal BMS's so most people wouldn't recommend series configurations at all. I'll leave you to decide if you want to run series or not). I was powering a heated vest which consumes 5 amps at max heat and has 5 power settings. You can very roughly estimate that each power setting draws 1 amp (setting 1 is 1 amp, setting 2 is 2 amps, etc.), but the actual current draw is likely higher based on my testing. Here's the results: Heat 1 for 1.5 hours Heat 2 for 3 hours Heat 4 for 2 hours At this point the low voltage cutoff activated around 6.5 hours after I started running the heater! Obviously this isn't even remotely scientific as I used different settings and the only power setting that I can check the current draw accurately on is setting 5 which draws 5 amps (other settings use PWM so my cheap multi-meter is pretty useless). I'm pretty happy with these results and this pack should power my gear for a few hours with medium heat settings. *****Old Review: I used these batteries to build a large battery pack (wired three in parallel). They charged up just fine, but near the end of their first discharge (powering a heated motorcycle vest on medium heat, about 3 amps) all three cells dropped to 0.1 volts and ceased functioning. At my last voltage check (about 15 minutes before failure) the cells read 12.1 volts, well above the 10 volt discharge cutoff. Because the load was spread over the batteries, I had roughly 1 amp on each battery, which is within the 1.2 amp standard discharge rating on the datasheet. These batteries are rated for a continuous discharge of 6 amps each which I never hit in my testing. Really disappointed in these batteries. ... show more
Reviewed in the United States on November 28, 2019 by Mark
    • Very capable for various projects
I am a bit of a tinkerer. Bought two of these to use for various little projects around the house - i.e. testing solar panels and charge controllers, running various 110v items off power inverters, testing out vehicle lighting systems, etc. So far, they have taken everything I have thrown at them and performed like little champs. I ended up using them to build a solar battery bank for semi-off grid camping trips with my kids, and they keep our lights running, phones charged, and music playing all weekend with minimal solar recharging (read: in the woods under heavy cover). I have managed to run them almost completely down a few times. They've always recovered quickly, and still hold a charge exceptionally well. Last night, I used them to run a Craftsman shop light while working on a vehicle in my driveway for about 4 hours, and they performed beautifully. These batteries are very compact and lightweight, and they have been absolutely the perfect fit for my needs. However, I am now thinking I'll purchase a few more just to see how long I can run my little workshop on battery power alone. If you're looking to experiment with wind/solar power but don't want to risk blowing through expensive 200+Ah batteries, these are the perfect entry-level power storage, utilizing the latest in battery tech at a really affordable price. 10/10 will buy again and recommend to friends ... show more
Reviewed in the United States on October 19, 2020 by BAMF
    • For those who serious about Amp Hours must READ! 100ah
Size: 12V-100Ah
Review Image by Yaj Yaj
Bought 4 of these and let each of them sit on the charger for 11 hours. Ran a capacity test and all 4 of them fail their advertise capacity. The built in BMS cut off power right at 11 volts and the test has ended. These batteries are little above 60ah not even close to their 100ah as they claim. The first pair of battery their weight are the same, but the 2nd pair their weight are different it weighted less. Contacted the seller about sending them back and was told it will be at my own expense with a printed digital shipping label provided by the seller. It's not really a shipping label more like a return address label. Went Fedex to have them sent back. I opened a whole new can of worms, it would cost me over 300 dollars to send all 4 batteries back. Went home and contacted the seller but that didn't help much but wanted me to contact some 3rd party to see if they can help pay for the shipping cost. I accept my lost. I'm writing this review so you don't have to go through this! If you're serious about Amp Hours, take your hard earn money and look else where. Buyers beware! ... show more
Reviewed in the United States on October 6, 2024 by Yaj Yaj
    • Works for what I needed
I used this to replace a lead acid battery used in a largish speaker. The speaker came with a lead acid I replaced once already. The radio runs them down to almost nothing making the lead acids cycle life God awful and loosing significant capacity each time. This was a direct replacement and has worked great. Capacity is larger than the lead acid. It charges with its same internal trickle charger (also responsible for killing the lead acids since it never really stops trying to charge) So far it's lasted over a year where the lead acids would be un-useable within a month or two. I never measured the capacity. But it's apparent that any low current application would be fitting. And The BMS seems to protect it well enough in my application. I would not use this for UPS replacements. Inverters tend to draw alot of current. 4 stars because I see alot of people received ones with quality control issues and woranttee issues and I don't want to pump up a rating for a company that doesn't properly stand by their promises. It's also unfortunate to hear it doesn't have over current discharge protection. ... show more
Reviewed in the United States on November 9, 2021 by Jimmy

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