After a week I tried to start my 2004 odyssey exl (37k) and the battery was almost dead. Battery was replaced 3 months ago (interstate) with the same size. Checked if anything was draining battery by hooking up amp meter in series with the battery lead disconnected and the other end of the meter connected to the battery, it showed a .235 amp drain that 2 tenths of 1 amp. Is this within specs??? The dealer doesn't know. While all this was hooked up i opened the door so the interior light would come on and the reading was 3.6 amps because of the lights. Shut the door and back to .235... Any ideas??? It just might be a bad battery.............Joe....

 

You may have a bad cell in the battery,Take it to an Advance auto parts and let them do a draw down test to see what's up.

 

Hi I have a 2005 Odyssey and am having a battery drain also battery has been checked and they claim it's ok. If it sits over night in garage the battery is dead in the morning.Any clues on what may be the common problem with these vans

 

Battery drain being small could be from clock, a lightbulb ( under the dash ) with a dead filiment, bad cell as bucwheat states, sticking light switch with burnt out bulb.

 

did you test the alternator ???

 

Well problem found the motors on the sliding door were bad so only 800 bucks and we are rockin again I hope..all the electrical gizmos are great until they break.