Charge Suunto D5 with the supplied USB cable. For charging, use a USB port of 5 Vdc, 0.5 A as a power source. If the battery is very low, the display remains dark while charging until the battery has reached an adequate charge level.
You cannot use buttons on your Suunto D5 when the USB cable is connected to a computer. When charging from a wall outlet, or if your computer goes to sleep mode, the buttons work again.
You must only charge your device using USB adapters that comply with the IEC 62368-1 standard and have a maximum output of 5 V. 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 D5 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.