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  • The Toyota Prius Hybrid automobile contains a sealed 38-module nickel metal hydride (NiMH) battery pack providing 273.6 volts, 6.5 A·h capacity and weighing 53.3 kg (118 lb). This is supplied by Japan's Panasonic. They are normally charged to 40–60% of maximum capacity to prolong battery life as well as provide a reserve for regenerative braking. Each battery uses 10 to 15 kilograms (22 to 33 pounds) of lanthanum.

Freebase Commons Engineering /engineering