Sealey cordless power tool batteries for cp5418vcp2600 1836v sealey cp5418vbp this 18v battery for cp5418v from sealey has a slim compact and lightweight design due largely to the lithium ion battery technology delivering power and performance for most tradesmens requirements weight for weight li ion batteries give an all round better performance than standard ni cdni mh cells li ion maintains a higher energy density level generally twice that of a ni cd cell giving more battery