I ordered this 12V 100Ah LiFePO4 battery as a spare because the price was attractive. Unfortunately, after proper testing, the performance fell far short of the advertised specifications.
I fully charged and discharged this battery three separate times to ensure the results were accurate and repeatable. Across all three test cycles, the measured capacity was consistently between 72 and 73 amp-hours at a discharge rate of 6 - 8.5- 10 amps, confirming that this was not a one-off test anomaly.
In terms of energy, the highest result I achieved was 934.5 watt-hours, while a true 12V 100Ah LiFePO4 battery should deliver around 1280 watt-hours. That's a shortfall of 345.5 watt-hours, or roughly approximately 37% less capacity than advertised.
The battery also weighs only 19 lbs, which is unusually light for a genuine 100Ah LiFePO4 battery. Based on both the low weight and the poor, repeatable test results, I strongly believe the manufacturer used smaller internal cells than advertised, which would explain both the reduced weight and the severely reduced capacity.
To make matters worse, the battery arrived with no instructions, no warranty card, and no specification sheet of any kind. The only information provided is what's printed directly on the battery itself, which is unacceptable for a product of this type and cost.
Overall, this is the worst capacity result I've seen from a battery advertised as 100Ah. Due to the large discrepancy between the claimed specifications and real-world performance, the consistent failure across multiple charge/discharge cycles, and the complete lack of documentation or warranty information, I am very disappointed and cannot recommend this battery. I will be returning this battery to Walmart.