This Lithium-ion battery pack for FreePlay takes all the hassle out of powering your portable PA system.
Rather than using 8 x D-Cell batteries, simply grab one of these, and you'll get up to 10 hrs continuous performance from a single charge.
(Mackie notes the following: "Your mileage may vary. Battery life is dependent on sustained volume levels")
Recharge your FPBATT by simply plugging your FreePlay into power when you get the chance.