Fluke BP190 NiMH Battery Pack. Mfg part Fluke 677390. Set of NiMH batteries designed for use with Fluke ScopeMeter 190 and 190C Series, as well as in the Fluke 430 Series. The battery pack has to be charged in the instrument. Fluke BP190 features Nominal Voltage: 7.2V, Capacity: 3,500 mAh.