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SR731 silver oxide (SR) and alkaline batteries (LR) are commonly used in watches, clocks, timers, calculators, laser pointers, toys, and LED "blinkies". Batteries that meet the IEC 60086-3 standards for watch batteries carry a "W" suffix. The functional differences between silver oxide and alkaline are:
SR731 batteries can be used to replace the following: SR731SW, V329, D329, GP329, 329, 329A, 329X, E329. All have dimensions of 7.9 mm diameter 3.1 mm height, and a capacity of 37 mAh.
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