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

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