The shimano steps bt e6000 is a high quality long lasting rear rack mounted lithium ion battery pack for shimano steps systems shimano steps bt e6000 battery features 1000 charge cycles without significant power loss approximately four hours charge time high 418wh capacity 36v 116ah average weight 2550g about shimano steps a system with components that cater to everybodyrsquos needs and delivers ultimate performance and reliability thatrsquos the heart of th