And compatibility lithium iron phosphate (lifepo4) battery packs. Intelligent battery management system (Bms) Built-in to auto. Vmate and maintenance-free battery operation.Please give us your full name, telephone number and detailed address when ordering. We are always open to new ideas and ready to help. We work 24/7, even on weekends and holidays. If contrary to expectations, there is a problem with the item you received, please do not hesitate to let us know.