An improved battery tester for determining the acceptability of a Lithium lfur Dioxide (LiSO.sub.2) storage battery at a given temperature and with one or more cells therein. The tester is generally made up of a first comparison circuit having a series of series interconnected components, namely a comparator,...http://www.google.ca/patents/US4659994?utm_source=gb-gplus-sharePatent US4659994 - Battery tester