Instruct: Classify the given review into positive or negative sentiment.
Query: Subpar replacement

I purchased this battery to use with my Pentax K10D. As another reviewer mentioned, mine also became lodged in the camera body and it was difficult to remove. It did work okay in the battery grip and held a decent charge (not as good as the Pentax battery that came with the camera, but not bad for the price). However, about two years after I purchased the battery, it suddenly refused to take a charge. I cleaned the battery contacts with an eraser and with a machinist's stone, but this did not help.Pay the extra money and get a reliable battery.