How long does the battery last on budget massage guns?

Most budget massage guns provide two to six hours of battery life on a full charge, depending on speed setting. At medium speed, expect three to four hours, which translates to roughly two to three weeks of daily 15 minute sessions. Look for USB C charging, since it is faster and more convenient than proprietary chargers. Battery degradation is gradual; expect about 80% of original capacity after two years of regular use.