Charge Suunto EON Core with the supplied USB cable. For charging, use a USB port of 5Vdc, 0.5A as a power source. If the battery is very low, the display is off while charging until the battery reaches an adequate charge level. When battery is so low that device cannot be turned on, a red led is blinking next to the display. Blinking stops when battery has enough power to start the device.
When device is on and and battery is charging, battery symbol in the upper left corner of the display turns green.
You must only charge your device using USB adapters that comply with the IEC 60950-1 standard for limited power supply. Non-compliant adapters are a fire hazard and a risk to personal injury and might damage your Suunto device.
DO NOT use the USB cable when Suunto EON Core is wet. This may cause an electrical failure. Ensure the cable connector and connector pin area on the device are both dry.
DO NOT allow the connector pins of the USB cable to touch any conductive surface. This may short circuit the cable, making it unusable.
Rechargeable batteries have a limited number of charge cycles and may eventually need to be replaced. The battery should be replaced only by authorized Suunto Service Centers.