battery tester 1-2 battery tester (0-10v) model:w602y 1-4 battery tester (0-20v) model:w404y english version : the operation and display both are supply voltage can change for the need of the customers . chinese version : the operation and display both are chinese. connecting computer version : connecting computer,automatic upload the result date,it is to stored and printing date. function introduction: the testing instruments can test : lithium hydronium cell(group),nicel hydrogen cell(group),polymer battery,dry cell,storage battery,and so on. it is fast meansuring speed( <1s ),large measuring range,high precision,good reliability and high antomaticity,wonderful man-machine interface,and so on. can be used with any type of battery manufacturers to production,testing,research and development. specific function:(can test): cell voltage(v1), load voltage(v2), discharge(dc), charge(ch), internal resistance(ir), short-circuit protection time(spt), short-circuit pr