Combat Points Boosters double the number of Combat Points earned in Battles until the Booster is spent. They can give 500 or 1000 Combat Points, depending on the Booster.
Here’s how it works
Say you have a 500 Points Booster active, and you earn 60 Combat Points from a Battle. The Booster will give you another 60 Combat Points (for a total of 120), and have 440 Points remaining.
This will happen after every Battle until all the Booster Points are spent. So, if you finish a Battle and earn 60 Combat Points while there are only 20 Points left on the Booster, you'll earn a total of 80 Combat Points (60 from the Battle, and the last 20 from the Booster).
You can refill your Booster Points by getting more Boosters - they stack with no limits.
Note: The number of Combat Points you see in the Battle Result window is already doubled.
You can get Combat Points Boosters
The number of Boosters available in the Shop is limited.