OP-1 original - how long does the battery last? April 06, 2023 10:53 Updated the battery in OP-1 original will last about 8-10 hours of constant use, on a full charge. in standby mode the battery will last about 16 hours. tips for maintaining battery health Related articles tips for maintaining battery health update utility - how do i update my unit? OP–1 original and midi OP-Z - how long does the battery last? OP–1 - where can i order spare parts?