PRiMX50U-Power is the world's most powerful 21700-sized cylindrical 5.0Ah battery, driving the expansion of cordless products with advanced Tab-less technology. This innovative technology enhances alignment control, improves safety, and reduces resistance by 20% due to the thinner electrode plate that supports high power performance. The 5.0Ah capacity is achieved with 91% high-nickel cathode material and SCN(Si-Carbon-Nanocomposite) anode material. PRiMX50U-Power can charge to 80% capacity in just 15 minutes and provides more than three years of use without degradation. *PRiMX stands for "Prime Battery for Maximum Experience" which is SAMSUNG SDI's battery brand that encompasses all of our technologies and innovations.