Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 4 year owner, great product

I have owned this item for over 4 years. I have never owned a different model or brand so I can only cover how reliable and useful it has been....VERY. I initially bought this to recharge my car when my battery went dead. I have since used every function of this device. I have a slow leak in a tire that I pump up every week or two with this and I run my 95w laptop off of it every few weeks (it lasts for about 4 hours if I put the laptop on "powersaver mode").The only problem I have ever had occured just this week. I had to pull out the battery as it wasn't being recharged correctly. I hooked the battery (it's a 19ah battery for those that care) to a proper recharging station and it is fully functional again. I have been very happy with this purchase.