In my opinion, Bosch has one of the most under rated 12V lines around. It's weird because they are one of my favorite 12V lines along with Milwaukee. I love there 12v drill and impact and is probably one of my most used 12V tools. Anyways, I am happy to let you know that Bosch has just improved their 12V line with an introduction of a 2.5 Ah batter, model BAT415. The 2.5 Ah will give the user roughly 25% more runtime than their previous 2 Ah batteries. The batteries will work down to -4 degree Fahrenheit. If you are a Bosch fan and use their 12V tools, this would make a nice addition. It seems to be the same size as the 2 Ah batteries and they will work with all your 12V Bosch tools.