This publication applies to portable rechargeable@ or secondary@ cells and batteries1 based on the following electrochemical systems:a) Nickel-cadmiumb) Nickel-metal hydridec) Sealed lead-acid2 d) Lithium-ion Section 1 of this standard contains general information and all standardized performance and mechanical tests upon which all the specifications in Section 2 are based.Section 2 specification sheets list those tests and requirements described herein that are required for each battery. Not all tests in Section 1 are necessarily required on every specification sheet.Part 2 of this standard describes all safety tests and requirements.1 Unless otherwise noted@ the word ??battery?? is used to refer to either cell or battery or both in the remainder of this document.2 ??Sealed lead-acid?? is the commonly accepted descriptor@ although technically these batteries are not completely sealed.?