Carbon-Pile-Battery-Alternator-Tester-Sealey-BT91-11-Steel-case-with-heavy-duty-copper-cable-&-clamps-Dual-large-sized-moving-coil-meters-are-reliable-&-easy-to-read-Suitable-for-testing-12 Volt-batteries-alternators-regulators-&-starters-Carbon-Pile-Battery-&-Alternator-Tester