Lithonia Lighting Nickel–Metal Hydride (NiMH) Nickel–Metal Hydride (NiMH)
Lithonia Lighting
Lithonia Emergency Systems manufactures a wide selection of exit signs, emergency lighting units and emergency power systems for commercial and industrial applications as well as special environments. These products include Signature and Precise architectural exit signs; Extreme all-conditions exit signs; Quantum thermoplastic exit signs and emergency lighting units; Affinity architectural emergency lighting; Titan steel exit signs and emergency lighting units; Merlin LED exit retrofit kits; Power Sentry fluorescent battery packs; and standby AC power systems.
Nickel–Metal Hydride (NiMH)
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%.