Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Engineer

I purchased this model about 5 Yrs. ago and it has performed excellently. I have 3 small lawns that I mow about once a week all year. I'm still using the original battery and it still seems to hold a full charge. After about 2 or 3 years I thought I needed to replace the battery as the mower was running out of charge by the end of the job. With a tip from the store I bought it from, I discharged it all the way and the recharged it again. This rejunivated it and it is working fine 2 or 3 Yrs. hence. Now once a year I don't recharge it for 2 or 3 weeks in a row to exercise the battery and prevent this possible battery memory effect. My Neighbor is so impressed with this mower that he wants to buy one also.