Nickel–Metal Hydride (NiMH) Ballasts & Drivers

An electrical ballast or driver is a device intended to limit the amount of current in an electric circuit.

 

A familiar and widely used example is the inductive ballast used in fluorescent lamps, to limit the current through the tube, which would otherwise rise to destructive levels due to the tube's negative resistance characteristic.

 

Emergency Lighting is now selling programable LED drivers that will allow your LED lighting to be dimmable. When your driver goes out let us know the milliamps of the driver and we can program the LED to the exact milliamps.

NiMH batteries can have two to three times the capacity of an equivalent size NiCd, and their energy density approaches that of a lithium-ion cell. Nickel–Metal Hydride batteries are good for high current drain applications because of their low internal resistance.

 

The disadvantage of NiMH batteries is their high rate of self-discharge. NiMH batteries typically lose 4% of their charge per day of storage. LSD NiMH batteries significantly lower self-discharge, but at the cost of lowering capacity by about 20%.