Choosing the right lithium iron battery can indeed be a daunting task, given the multitude of brands and varying price ranges available in the market. In your case, looking for a 12V 100 AH battery adds an additional layer of complexity to the decision.While I don't have specific information on LiFePo batteries, I can suggest a general approach to help you make an informed choice. Firstly, consider your specific needs and usage patterns. Think about factors such as the intended application, required capacity, and expected lifespan of the battery.Also, I'd recommend checking out rechargeable CR123A battery. This information might be helpful in making an informed decision for your specific needs.