Battery Life. I have a Model 01512 weather station. When new, the 5-in-1 sensor battery life was great. The initial set lasted over 18 months. But since then, the life continues to deteriorate. The latest set lasted less than a month. I took the unit apart, and could not find any corrosion or shorting paths. From previous posts, it appears that, once the battery life starts deteriorating, there is no solution other than to replace the sensor. Is that correct? If so, it's pretty disappointing. when $100+ a unit lasts less than 2 years, it doesn't say much about the quality, or make me want to buy another AcuRite. Do you have any suggestions or hielp?