Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not Reliable

I bought this at Walmart. It wouldn't charge completely after 2 months. I returned it and was able to exchange it for another one. That one wouldn't start my Ford F150. It barely started my 2001 Subaru. Now it won't charge completely even if I leave it plugged in for hours. My local Walmart doesn't even stock it any more. They probably got tired of the number of returns. Save your money. Get another brand.