... heater Zinc Manganese Dry Battery R40 Competitive price Equivalents:6, 6 IGNS, 6 IGN. S, 6 IGN Screw, 905, 905FC, 906, 906AC, ... phenomenon2, Easy to use, no maintenance, especially suitable for free maintenance environment3, Because of easy to use, long ... also can form batteryApplicable to small current intermittent discharge (for high school physics experiment teaching , SPC telephone, railway ...