PayPal Canada is hosting this year's BattleHack in Toronto on July 18-19. The Task is to build a mobile app in 24-hours to better your city or community. Coders in Tokyo, London, Berlin, Venice and Chicago have already battled it out. Soon, a few hundred Canadian developers will take up the challenge at PayPal’s BattleHack in Toronto on July 18-19th. Team Angry Kittens (last year’s Toronto winners) won a ticket to the World Finals where they placed second and nearly won the grand prize of $100,000 (US).