I have not had any issues with Mindstorm batteries. An extra maybe good while one on the charger. But that is all. The rechargable or regular batteries go quickly...I will never use those. Robotics & STEM Initiatives Specialist Prince William County Public Schools 703.791.7521 Tell me, I’ll forget Show me, I’ll remember Involve me, I’ll understand ________________________________ From: First Lego League in Virginia and DC <[log in to unmask]> on behalf of Rajesh Shah <[log in to unmask]> Sent: Friday, October 25, 2019 7:50 AM To: [log in to unmask] <[log in to unmask]> Subject: [VADCFLL-L] EV3 Rechargeable Battery Any experience on how many years these battery last. We bought a new one last season. It’s working ok so far this year. We are debating whether to buy new battery this year. Any suggestions ? Thanks, Rajesh Shah Coach Raining Robots Sent from my iPhone -- To UNSUBSCRIBE or CHANGE your settings, please visit https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or leave the list". -- VADCFLL administrative announcements are sent via VADCFLL-ANNOUNCEMENTS-L. Visit https://listserv.jmu.edu/archives/vadcfll-ANNOUNCEMENTS-l.html to subscribe. -- To UNSUBSCRIBE or CHANGE your settings, please visit https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or leave the list". -- VADCFLL administrative announcements are sent via VADCFLL-ANNOUNCEMENTS-L. Visit https://listserv.jmu.edu/archives/vadcfll-ANNOUNCEMENTS-l.html to subscribe.