Instruct: Classify an Amazon review as either positive or negative.
Query: Held it's charge for 2 months...

I bought this to replace an original dead batter for the Roomba. I followed the charging procedures and then let it do it's thing. The battery lasted for about two months. After that, the roomba would dock and charge full, then when I told it to clean, it'd start cleaning for 15 secs, then it'd start beeping and die. Now my Roomba just sits on the ground collecting dust.