Roland BTY NIMH A Rechargeable Amp Power Pack

Official Roland rechargeable battery pack for select amplifier models
Easy to install and remove
Longer runtime than using AA batteries
Allows the amplifier to deliver more output power and SPL than what’s possible with standard batteries
Premium design with safe, efficient, and reliable NiMH (nickel-metal hydride) battery
Can be charged with the AC adaptor included with the supported Roland amp model (excluding the BA-330)