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Life Expectancy for the Rechargeable Battery in My Garmin Device
Rechargeable batteries found in Garmin® devices naturally lose capacity over time due to charge/discharge cycling. Under normal operating conditions, batteries should retain approximately 80% of their original capacity after a few years of frequent charge/discharge cycles. However, there are several factors that can accelerate the normal degradation of battery capacity, including but not limited to:
Exposure to extreme temperatures (refer to the Specifications section of your owner's manual for recommended operating and charging temperature ranges).
Leaving the battery completely charged or discharged for long periods of time (anything longer than two weeks).
Most Garmin devices using a rechargeable battery do not have user replaceable batteries. This is due to needing to retain the water resistant seal.
For information regarding the typical battery life of a single full charge, consult your owner's manual.