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  • 1. The Dell 7430 was first sold in April, 2022. Though you might have purchased it in 2024, the machine might be two years older. 2. As long as the main battery is charged, it might provide power for the clock. By leaving it uncharged for two years, both batteries were likely damaged -- look for the main battery to soon need replacement. Commented yesterday
  • There is also no promise the battery was fresh when it was installed. In normal circumstances, a computer being unpowered for only only months, not years, this setup is fine. Computers are not generally intended or designed to sit unpowered for multiple years without some minor maintenance required to get them up into a running state again. Commented yesterday
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    "However, those coin cells generally last for 10 years." - Ten years sounds more like the shelf life of a battery than any possible working life with an unspecified load. The battery will self-discharge even when unused and sitting on a shelf with stable environmental conditions. You're making a faulty conclusion based on a flawed assumption. Commented yesterday