Rechargeable DC Battery

Over the past few days I’ve seen stories regarding the LEGO Education EV3 Battery Pack circulating on the various forums and FB groups.  Yesterday LEGO Education released a statement to customers and partners who are affected by this issue, confirming the problem.  I’ve put a small excerpt of the statement below.  You can download the full text here (zip file with two PDFs): [LINK].

Dear  Customer ,
The  LEGO  Group  prides  itself  in   delivering  high  quality  products  and  regrets  to  inform customers  of  an  issue  related  to  the  LEGO®  MINDSTORMS®  Education  EV3 rechargeable battery .
LEGO  Education  has  identified  a  circuit  error in  the  LEGO  MINDSTORMS  Education  EV3  rechargeable battery .
The  error  does  not  in   any  way  relate  to ,  or  impact  the  EV3  programmable  brick  or  the  charger/transformer.  The  majority  of  the  batteries  that  have  been  distributed  do  not  have this  error,  but  every  battery  in   stock  is  now  being  retested  to  ensure  it  charges  properly  before  shipping  to  customers,  and  new  supplies are  being  sourced.

So in short, the issue is with the pack, not the brick.  So for now, just use AA batteries until you can have the pack replaced.

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