Lithium battery Cathode SP-M-700 (800) 1) Max. Input Power: 700VA-800VA2) Frequency: 35KHz-40KHz 3) Welding Technology: A, Nickel Tab 0.10mm+Copper Foil 0.018mm Three Multipoint welding (Length is 26mm) B, Aluminum Tab 0.10mm+Aluminum Foil 0.018mm Four Multipoint Welding (Length is 26mm) 4) The Check and Accept Standard: Both metal seeps, When you destroy them, the foil will stick to the tab (about 80% area).