How to Identify an Unsafe LiPo Battery Pack

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 the pack visually. Look for any swelling, puffiness, or bloating of the cells—this is a clear sign the battery is damaged. Next, check for any physical damage such as punctures, tears in the outer wrapping, or corrosion on the terminals. Smell the battery; a strange or chemical odour can indicate internal damage. Before use, measure the voltage of each cell with a balanced charger or a voltmeter; cells significantly below 3.0V or with uneven voltages may be unsafe. Avoid charging or using packs that get excessively hot quickly. If the pack shows any of these signs—swelling, damage, strange smell, uneven or low voltage—do not use it. Dispose of it safely at a battery recycling point. Regularly inspect and store LiPo batteries in a cool, dry place, ideally in a fireproof LiPo bag, to prevent damage and maintain safety.