My need is to maintain my 100 AH LiFePo4 batteries during periods of non-use. A bare bones, 120 VAC powered charger. If it has capability to charge 12 volt lead/acid batteries, all the better, as long as it is either a no fail auto system or has a selector switch. Fast charging is not the goal. If it takes 24 hours to reach a level of good health, that is acceptable. An onboard digital display is preferred. The charger does not need to speak to me by means of my cell phone. It does not need to function at absolute zero. I have no need for 12 different languages in the output. I speak only English. Can you recommend the animal I desire that is reasonably priced and is a quality item? If you can, please do. Thank you.