Cortex - No power from battery?

Sorry if this is answered elsewhere, but I don’t have days to comb through all of the “cortex not working” threads to find an answer. I have never had this before.

My cortex is powered and fine when connected to computer. However, there is not power when connected only to a battery (no lights whatsoever). Confirmed it isn’t the battery. Was just one cortex. Now a second. I can’t help but think the kids have done something. Can you please help?


It sounds like the power connector of the Cortex is damaged. When you look inside the Tamiya 7.2V connector what do you see? Are the pins uneven or pushed back?

If so, please contact for repair options.