Lead Acid vs. Nickel Metal Hydride

 Discover Clean & Green series  Absorbed Glass Mat (AGM) Valve Regulated Lead Acid (VRLA)  Low self discharge rates (Approx. 1%-3% per month at 20 °C–25°C / 68°F–77°F)  Battery packs total 144V  Weighs 89.5 lbs each  Weighs 1074 lbs total

Performance Averages after 25 cycles

 End Point Value: Voltage of the battery at the end of discharge period  The current discharge rating decreases as the length of time of the current discharge & the end point voltage increases

 The power discharge rating decreases as the length of time of the power discharge & he end point value increases

 As depth of battery discharge increases, total numbers of times battery will successfully charge decreases

 Nickel-Metal Hydride battery pack  Ni-MH are known for having high specific power, a high energy density, a long cycle life, and for being a low maintenance choice  Environmentally friendly  Total weight of battery pack is 118 lbs  compared to 1074 lbs in our 144V system  Power output of 36 hp (27kW)  Provides Volts (Gen III & IV)  Panasonic Metal Case Prismatic  Since 2004 model

 Feb Prius has available in US for 10 years  Consumer Reports did testing to determine lifetime of battery and cost to replace it  2002 Toyota Prius with over 200,000 miles on it compared to the nearly identical 2001 Prius with 2,000 miles tested by Consumer Reports 10 years before  Results:  Little difference in performance when tested for fuel economy and acceleration  Overall fuel economy of the 2001 model was 40.6 miles per gallon, while the 2002 Prius with high mileage delivered 40.4 miles per gallon  Effectiveness of the battery has not degraded over the long run. The cost of replacing the battery varies between $2,200 and $2,600 from a Toyota dealer, but low-use units from salvage yards are available for around US$500

 Battery Details

 Very little was changed for 2010 model  Slightly redesigned  Designed to last vehicle Life or up to 180,000 miles  The shortest life cycle occurs when the battery pack is stored at high temperatures for long periods of time