12V 5Ah LiFePO4 Deep Cycle Battery 2 Pack, 2000+ Cycles Lithium Iron Phosphate Rechargeable Battery for Solar Power,Lighting, Power Wheels, Fish Finder and More, Built-in 6A BMS

Works great for UPS battery! Perfect fit and over 3x the backup time while being lighter weight.

Worked perfect for replacing the battery on my chamberlain garage door back up battery. Less weight, more capacity for the same price as lead acid/agm batteries.

Awesome battery. I used it for replacement of a rechargeable Coleman fluorescent camp lamp. 1/2 the weight with longer usage time of 7-8 hours. And the price was so reasonable. Would definitely recommend and I would purchase again when needed.

There is a lot of reviews of the benefits of LiFePO4 over the lead acid batteries included in these garage openers. General advantages include higher capacity, lower weight, longer lifespan, and lower maintenance. LiFePO4 batteries are also more environmentally friendly and safer than lead-acid batteries, as they do not contain toxic metals or corrosive acids.For our use, it was plug and play for us and no issues after it was charged. It was definitely lighter and I look forward to the other benefits.

Capacity tested by discharging according to data sheet at 0.2C (1.0 A) until voltage at the battery terminals drops to 12.0 V. Test capacity is 6.2 Ah. Note the voltage at the tester is lower than 12.0 V due to resistance of connecting wires.The only unusual behavior I noticed was the BMS termination voltage of 14.4 V. Usually the charger termination voltage is 14.4 V while the BMS (as backup protection) termination voltage is 14.6 V. Having the BMS disconnect the battery at full charge is not ideal, but with current Dunning-Kruger effect of social media viewers starting lithium fires, maybe it is necessary.If any problems arise I will post them here and adjust ratings.

The backup battery in my LiftMaster garage door opener gave out after 6 years and I looked at this one as a potential replacement. It is the same size and voltage, but is less than half the weight, less than half the cost, and will probably last twice as long due to the better battery chemistry.The battery arrived only half charged, but charged to 100% soon after I installed it. I absolutely recommend this battery as it is clearly superior to the original.

Amazing on the first run. I felt like it lasted forever. Then the fun was over. Won't take a recharge.

- NOT A DIRECT DROP IN REPLACEMENT – MUST USE CORRECT CHARGER- I gave this otherwise 5 star high quality LiFePO4 battery one star rating less for the website description not being adamant about using the mandatory LiFePO4 specific charger. You must only use a specified LiFePO4 charger. The website description dangerously suggests that you can arbitrarily charge this battery with a lead chemistry SLA type charger. Quoting verbatim from the website, “(please use LiFePo4 special charger, with fully automatic SLA charger may not be fully charged)” The website description should have explained that you MUST match the battery charging system to the very specific needs of a LiFePO4 chemistry battery. Judging from the reviews, the public is woefully uneducated about the applications for a LiFePO4 battery.- This is a superior chemistry LiFePO4 Lithium Iron Phosphate battery. It is very different than the most common Lithium Ion, Lead Acid chemistry batteries: SLA, AGM, Motorcycle, etc.. If your product has an integrated Lead Acid battery charger, or even a Lithium-Ion charger, you MUST NOT just substitute, swap in, or drop in a LiFePO4 battery in place of a SLA Sealed Lead Acid battery; or AGM type lead acid battery, or Lithium-Ion battery.- Those charging systems ARE NOT compatible with the LiFePO4 battery’s absolutely strict charging parameters. Poor case scenario is diminished life and output of the LiFePO4 battery. WORST CASE SCENARIO IS YOU BURN DOWN YOUR HOUSE. Think about all the house fires you hear about that are caused by Lithium batteries. Probably those house fires are not always caused by a battery failure per se itself, but are caused by the improper charging of the battery.- I have several LiFePO4 batteries being used in various applications. For those particular applications, these LiFePO4 batteries have superior characteristics compared to the old ordinary Lead Acid batteries or even the newer Lithium Ion batteries.- For charging this LiFePO4 battery I will be using a strictly designated specifically designed LiFePO4 Battery Charger. A Lead Acid battery charger can be a very simple design and will cause no harm to a Lead Acid battery. However, LiFePO4 battery chargers must have a semiconductor “brain” Integrated Circuit chip set that constantly measures the battery temperature, battery voltage, and supplies very complicated CC constant current and CV constant voltage to the battery to charge it but not destroy it or cause it to catch on fire.- Additionally to the monitored temperature, CC and CV output, when the LiFePO4 battery is fully charged, the battery charger MUST shut off charging power. Lead Acid battery chargers MUST NOT be used on LiFePO4 batteries because they cannot monitor and output the correct CC and CV as needed and they always default to a trickle FLOAT charge. The continuous trickle FLOAT charge is wrong and dangerous for a LiFePO4 battery. I have attached a photograph of a graph of the LiFePO4 complicated voltage and current requirements that can only be provided by a designated LiFePO4 batter charger. I have attached a photograph of the mandatory charging characteristics of a LiFePO4 battery charger.