Introducing the Mackwell B906 Ni-MH 3+3 Emergency Lighting battery, Mackwell reference 9001671 6C 4Ah NiMH 3+3 Twinstick Battery, 7.2v, 4Ah. This is a brand new Mackwell B906 Ni-MH 3+3 Emergency Lighting Battery used for emergency lighting. This is a genuine Mackwell brand and not an unbranded alternative.