Epson Runsense SF-810 User Manual - Page 19
About the battery
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Setting up your SF-810 The Time screen is displayed. Note: O When you do not use the product for a while, it enters sleep mode and the time display turns off. The display is restored the next time you move the product. O If time synchronization fails, the signal from the GPS may not be being received properly. Set the Time Adjust option in the Sys. Settings menu. See "System Set. options" on page 76. About the battery You can check how much charge remains from the battery icon below the time display. Battery icon Hours remaining* GPS On Pulse (Heart rate) On GPS On Pulse (Heart rate) Off 20 to 14 hours 24 to 17 hours 14 to 8 hours 17 to 10 hours * Approximate battery life remaining while in Chronograph mode. Actual battery life will vary. 8 to 2 hours 10 to 3 hours 2 to 0 hours 3 to 0 hours c Important: If the product is left for a long time with a low battery, the performance of the rechargeable battery will deteriorate. Make sure you charge the product at least once every six months even when it is not being used. Note: If the battery runs out, the measurement data is still stored in the memory.The date and time may reset, and the Date may need to be manually re-entered. 18