Hi! The Gen-2 battery for my IQ brain no longer works and I’m wondering if the Gen-1 battery would work as a replacement since the Gen-2 batteries are out of stock from VEX. Anyone know if the Gen-1 batteries work in a Gen-2 IQ Brain?
Yes, that will work. All the Gen 1 and Gen 2 gear is cross-compatible except that the two generations of battery use different chargers.
More info on this page:
You can also try and get it replaced, if it is broken. VEX Support is very helpful, and I have replaced one of my motors like that before.