i have this vacuum canister for coffee that uses 4 AA bateries to run. this is a very stupid idea b/c it sits next to a wall outlet and it eats batteries like crazy b/c every time it detects a lose in chamber pressure it starts pumping. i want to make it so that it does not run on batteries but instead runs through a wall outlet. what would i need to buy and what would i need to do to make this happen. it does not look difficult i just dont know how to do it with out burning down my house. thanks