usage notice: 1. When the remaining power is insufficient or the strength is too strong, please disconnect the power supply, otherwise it will easily burn the battery. 2. When charging, please place the battery and the charger in an open and non-flammable place, and keep the environment dry to ensure safety. When the indicator light of the charger is red, it means charging, and when it is green, it means that it is fully charged, and the battery is fully charged. Please unplug the power supply in time. 3. If the battery is not used for a long time, the battery will slowly discharge, resulting in the power being too low to be charged. Please charge the battery to more than 80% if it is not used for a long time, and charge it every 2 months.