Battery

The sense band has an internal, rechargeable battery. Rechargeable batteries have a limited lifespan, which depends on several factors, including battery technology, operating temperatures, charging habits, and how the device is used and cared for. You can maximize the battery lifespan by keeping your device in good condition and charging and storing it according to the instructions below.

• Keep the charging contacts of your device clean to effectively protect your device from oxidation and other possible damage caused by dirt and salt water (e.g. sweat or sea water). The best way to keep the charging contacts clean is to rinse the device after each training session with lukewarm tap water. The device is water resistant and you can rinse it under running water without damaging the electronic components.
• Before charging, make sure there’s no moisture, dust or dirt on the charging contacts of the device and cable. Gently wipe off any dirt or moisture.
• Do not charge the device in temperatures under 0 °C/ +32 °F or over +40 °C/ +104 °F.
• Do not charge the device near flammable materials or on flammable surfaces.
• Do not charge the device when it’s wet.
• Do not leave the device in extreme cold (below –10 °C/14 °F) and heat (above 50 °C/120 °F) or under direct sunlight.
• Avoid discharging the battery completely before recharging and charging the battery full every time. Keeping the battery charge between 10-90% puts less strain on the battery, helps the battery maintain optimal performance, and extends the battery’s life.
• Do not leave the battery fully discharged for a long period of time or keep it fully charged all the time.
• Store the device partially charged in a cool and dry place. If you won’t be using your device for a while, charge it to around 50 percent before storing it. Also, turn off the device through the app settings. The battery slowly loses its charge when it is stored. If you are going to store the device for several months, it is recommended to recharge it after a few months.

Over time, rechargeable batteries gradually wear out, and their capacity decreases. The average lifespan of rechargeable lithium-ion batteries used in phones and sports watches, including Polar watches and devices, is about 2-3 years. The battery will have approximately 80% of its original capacity left at this stage, and the percentage continues to decrease with time and use. The actual battery lifespan varies depending on use and operating conditions.

At the end of the working life of the product Sense encourages you to minimize possible effects of waste on the environment and human health by following local waste disposal regulations and, where possible, utilizing separate collection of electronic devices. Do not dispose of this product as unsorted municipal waste.