The expiry date is printed on the battery only valid if the battery is not installed on everything. Once it put into a device, even if you do not use the battery will expire within a few months. You need to change batteries in smoke detectors twice a year.
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The expiry date is printed on the battery only valid if the battery is not installed on everything. Once it put into a device, even if you do not use the battery will expire within a few months. You need to change batteries in smoke detectors twice a year.
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