All our RELiON LiFePO4 batteries have fast-charging capabilities and are 100% maintenance free. Lithium ion batteries are green energy batteries, helping to make a difference. If you need a Renewable Energy option, a great engine starting battery, or have an application where weight is an issue, these lithium ion batteries are a great choice. These deep cycle batteries keep you in business, and come with a one year warranty. RELiON is ensuring we have a renewable energy option out there. This is a great one to take.