My 2001's battery lasted just over 2 years/ 50000 miles. My 2003's original lasted 10000 miles... So there is no set time frame.
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"Never Stop Exploring" BOD Member SXFC


Garfield 2011 Red Brick Pro-4X
Radio Flyer 2005 Code Red Altima SE-R Sold
MagellanX 2003 Molten Lava SE 4x4 Sold
TabascoX 2001 Salsa XE 4x4 Sold