Methods of evaluation of the battery life of a battery-powered watch
IDT ISO 12819:2009
全国钟表标准化技术委员会(SAC/TC 160)
本标准规定了判定电池驱动手表的电池寿命的两种方法，并规定了制造商和销售商告知顾客所用的标注方法。
根据可获得的信息，不论是理论电池寿命还是实际电池寿命均需用本标准中给出的公式进行计算。
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