ok so my brothers accord has a bit of an idle problem but that not my problem. my problem is that his car keep drainind his batterys power, iver disconnected the radio and any other possible power source that could drain its power and it is still draining. its not the battery i know this for sure and the alternator is fine as well. can anyone help me out? im stumped

 

Sounds like a parasitic draw, you may have already done this, but try reading amperage at the battery using an ammeter with the key off. Anything more than a few milliamps is probably high. If you do find a draw, pull individual fuses until the draw goes away, then check to see what is on that fuse and go from there.

You can find many articles with better step by step than I gave by googling "battery draw test"

Thexton makes a terminal adaptor that makes this test easier to perform (it is part # 431), but you can do the test without it.
Make sure you start at the highest amp rating and work your way down (to protect the meter, in case you have a high draw - as your meter will be part of the circuit).