Synergy Digital Speaker Battery, Compatiable with Bang & Olufsen J406/ICR18650NH-2S Speaker Battery (7.4V, Li-ion, 3400mAh)
Specifications:
Compatible with Bang & Olufsen Speaker(s): BeoLit 15, BeoLit 17, BeoPlay A2, BeoPlay A2 Active, J406/ICR18650NH-2S