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 determine if a LiPo battery pack is unsafe, inspect it carefully before each use. First, check for any physical damage: swollen or puffed cells, cracks, punctures, or bulging are clear signs the pack is compromised. Next, look for corrosion or leakage around the terminals. Use a LiPo voltage checker to ensure each cell is within a safe voltage range (typically 3.7–4.2V per cell). If any cell reads below 3.0V or above 4.2V, the battery may be damaged. Also, feel the battery during charging or use; excessive heat (above 50°C) indicates a problem. Avoid using packs that have been dropped hard or exposed to water. If you notice any of these issues, do not use the battery—dispose of it safely at a designated recycling point. Regularly balancing cells during charging and storing packs at around 3.8V per cell can extend battery life and safety.