Instruct: Classify Amazon reviews into positive or negative sentiment
Query: poor reliability on 2 out of 2

I purchased two of these gauges several years ago since the price was attractive. Although they were used very little, both have gone bad. Both gauges now read "L" whenever applied to a properly inflated tire. I even, painstakingly, disassembled one of them and replaced the battery; but, that did not help.Judging by the other reviews, my experience was not unusual.By contrast I've owned a Brookstone tire pressure gauge for about 15 years which still works perfectly with the original battery.