Fluke BP190 Rechargeable NiMH Battery PackSet 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. The life of NiMH batteries is strongly influenced by the care that they receive. If properly maintained, the battery is capable of more than 500 charge/discharge cycles before dropping to 80% of capacity. Do not exceed the allowable ambient temperatures during charging, operating, or storage.