Hi, guys new to this forum i have always been interested in electronics, but have always excelled in automotive electronic's I would like to pose a question involving garage door openers. i work at a a city bus shop and we use a two channel garage door opener made by linear i would like to install this in the smallest case possible but my biggest hindrence is the 9v battery that power's the unit what can be used in place the rectangle batt? i also have a second question that may shoot my first request in the foot... :roll: these openers i've come to find out are rather weak and sometimes it's really hard to open the gates from inside the bus or standing outside (even at twenty feet!!) is there a way to boost the signal? i know that most car alarm's usually have an effective distance of at least 40ft one of the toyota faculty cars in the shop can reach over a hundred feet?!?! :shock: any help would be appriciated. thanX.