Complex sentence: Coinfeigm can only be used if the coin has enough energy (CP) stored in it--the CP of a coin starts at the maximum at the start of each battle and replenishes itself as battle continues.
Split into simpler sentences: Coinfeigm can only be used if the coin has enough energy (CP) stored in it. The CP of a coin starts at the maximum at the start of each battle and replenishes itself as battle continues.