Lifespan: approximately 1000 full charge cycles, with no significant performance loss Only necessary maintenance measure: clean and grease battery and connection poles (terminal grease, technical Vaseline, silicone-free) Designed for MTB, flat and compact profile, impact-resistant and vibration-resistant, as well as waterproof Without battery lock Note: Battery versions with an A at the end of the Shimano item number are no longer compatible with the old charger EC-E6000.