How to Identify if a LiPo Battery Pack is Unsafe to Use

Question: How do I tell if a LiPo pack is unsafe to use?

Answer: To check if a LiPo battery pack is unsafe, start by inspecting its physical condition. Look for any swelling or puffing—this is a clear sign the pack is damaged and unsafe. Next, check for any punctures, tears, or exposed wiring on the outer casing. If you see any, do not use the battery. Use a LiPo voltage checker or a multimeter to measure the voltage of each cell; any cell below 3.0V or significantly unbalanced voltages between cells indicates damage. During charging, monitor the battery closely—if it becomes excessively hot (above 45°C), emits a strange smell, or starts to swell, disconnect immediately. Always charge on a non-flammable surface and never leave charging batteries unattended. If you observe any of these signs, safely dispose of the battery at a local hazardous waste facility. Regularly checking your LiPo packs this way helps ensure safe and reliable use in your projects.