Newegg offers the Nyko Modular Controller Charger and Intercooler for PlayStation 4, model no. 743840832218, for $25. Redeem this $25 mail-in rebate to cut the price to $0. With $2.99 for shipping, that's the lowest total price we could find by $26, although we saw it with a $12 profit two weeks ago. This kit can charge two Dualshock 4 controllers simultaneously and increases airflow out and away from the system. Rebate expires August 30.