2001-2003 Toyota Prius Gen 1.5 Hybrid Battery Cells modules block cell batteries.
These are generation 1.5 Panasonic NiMh cells for your 2001-2003 Toyota Prius
They are redesigned and have improved performance than the original generation 1 cells
The gen 1.5 cells have higher capacity as well as better heat dissipation
If you plan on replacing the cells in your gen 1 prius upgrade to the newer gen 1.5 cells
They are a direct fitment to your 2001 2002 and 2003 Toyota Prius and are the same dimensions as the original cells
You will see an improvement in gas mileage and it will have more pep