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This rechargeable battery box has built-in Lithium polymer batteries for low weight and maximum power. Use the 8887 10VDC LEGO Transformer to charge the battery!  Motor speed can be controlled via the battery box speed control dial!  Output voltage is 7.4V!

8878 Power Functions Rechargeable Battery Box

  • Age Mark: 7+
  • Piece count: 1
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