.. note:: Hello, welcome to the SunFounder Raspberry Pi & Arduino & ESP32 Enthusiasts Community on Facebook! Dive deeper into Raspberry Pi, Arduino, and ESP32 with fellow enthusiasts. **Why Join?** - **Expert Support**: Solve post-sale issues and technical challenges with help from our community and team. - **Learn & Share**: Exchange tips and tutorials to enhance your skills. - **Exclusive Previews**: Get early access to new product announcements and sneak peeks. - **Special Discounts**: Enjoy exclusive discounts on our newest products. - **Festive Promotions and Giveaways**: Take part in giveaways and holiday promotions. 👉 Ready to explore and create with us? Click [|link_sf_facebook|] and join today! SAFETY NOTICES ============== Precautions about the use of the product ----------------------------------------- * Be sure to use the dedicated power adapter for this product for charging and discharging, and never use an overpowered power adapter; * Do not use the product in a high temperature environment, and the battery power should not be too low. Generally, it is best to start charging at about 30%; * Avoid plugging in the power adapter for a long time, and stop charging after charging. When the product is not in use, it is recommended to disconnect the power adapter to avoid battery damage caused by long-term charging. Precautions about the maintenance of lithium batteries ----------------------------------------------------------------- * Lithium batteries can be stored in a clean, dry, and ventilated room with an ambient temperature of -5°C—35°C and a relative humidity of not more than 75%. Avoid contact with corrosive substances and keep away from fire and heat sources. * Do not store the lithium battery with full charge for a long time. After long-term storage, it will easily cause swelling, which will affect the discharge performance. The best storage voltage is about 3.8V for a single chip. Fully charge before use and then use it, which can effectively avoid battery swelling.