That might not be the battery's fault.I really can't fault the battery unless the Walmart ones are just cheap. My car sits for up to two weeks sometimes. I didn't drive it for 13 days recently and when I went to go somewhere, it did start but seemed 'weak' when it first cranked. Three days later, same thing. Three days after that, just click, click, click. Less than 15 minutes on the charger got me started and on my way to O'Reilly's.