Lifespan: approximately 1000 full charging cycles, without significant loss of performance Only necessary maintenance measure: clean and lubricate battery and connection poles (pole grease, technical petroleum jelly, silicone-free) Design designed for MTB, flat and compact profile, shock-resistant and vibration-resistant as well as waterproof Attractive price-performance ratio Attention: Battery versions with an A at the end of the Shimano article number are no longer compatible with the old charger EC-E6000.