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What power source does the G1581 (GBM‑2100‑1ADR) use, and how long does the battery last?

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The G1581 (GBM‑2100‑1ADR) uses a battery-powered quartz movement and typically offers about 2 years of battery life under normal usage https://saicreationswatches.com/products/g1581-casio-g-shock-gbm-2100-1adr-analog-digital-watch-men

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