WARNING: Please check the generation - not compatible with generation 1! Slim design, internal execution Lifespan: approximately 1000 full charging cycles, without significant loss of performance Only necessary maintenance measure: clean and grease battery and connection poles (pole grease, technical Vaseline, silicone-free) Note: Battery versions with an A at the end of the Shimano article number are no longer compatible with the old charger EC-E6000, but rather with EC-E6002 or EC-E8004.