Massage guns can overheat. That is why it is advisable to always give massage guns a rest after continuous usage. Most massage guns can only be used within 30 mins to 1 hour, depending on the model. The ABIS Deep Tissue Portable Massage Gun FTM19 has an exceptional lithium-ion battery that allows for 3 hours of continuous use. It’s always best to give massage guns time to cool down after usage.