Based on many years of researching and manufacturing supercapacitor (EDLC) experience. Green tech developed EG and EM series graphene supercapacitor batteries with excellent performance, these products are ultra long life, fast chargeable, large power, safest, and can use at extreme temperature conditions. Green tech's graphene supercapacitor battery system is integrated with smart battery management system hardware and software, it can run without any maintenance and remote monitoring. It is the perfect option for high-end applications like military equipment, electric mining machinery, electric construction machinery, electric vessels, forklift, golf carts, AGV, solar energy storage systems, telecom tower backup power suppliers, UPS, microgrid energy storage, and so on. Most of the products comply with CE, UN38.3, IEC62619, ROHS, and UL.