Yes! The Bosch Powerpack 500 is totally compatible with the Spicy Curry Bosch. 

We offer the Spicy Curry with the Bosch Powerpack 400 36V battery as a complete bike only. We are not able to offer the batteries separately. If you wish to order an extra battery you can do so through Bosch or Currie Tech

*Note: If you have a Spicy Curry with Currie Tech battery (Avocado or Sandstone color), you can not use any Bosch battery on your bike, you'll have to stick with the system you have.  A replacement or extra Currie Tech battery can be ordered through Currie Tech at the link above.