25mA is an acceptable drain on this vehicle.... normal drain on this car is between 0.015 and 0.039mA, so you are right in the acceptable range.
If you are seeing the battery deplete after a few days you are going to expect that there is a defect in the battery (even if it is "new"), or that there is an intermittent drain that is occurring that you aren't seeing while monitoring it so far.
What I would do here is first try fully charging the battery (on a battery charger out of the vehicle, not just driving the car around) to get a good deep charge and then see if it is so quick to run down again; if it does not or lasts a day longer etc, then I would suspect the battery is questionable.
If it still goes totally flat over the same time period, then I would start disabling circuits one at a time to see if the problem goes away; starting with unplugging (both the connector and the cable lug) the alternator as they are common phantom drains like this, followed by pulling the IOD fuses (the ones with the little handle/box you can pull up out of the fuse box) to disable the ETACS (The second most common random drain).
Moving forward from there there are not a lot of common issues regarding drain, at least not ones that don't either have pretty obvious indicators (buzzing from the throttle body with key off, for example) or are constant drains and you would see a more substantial drain (for example the rear courtesy lights and the trunk lights both are common to stick on, but would show around a 0.100-0.300,A draw when they are the case).
Given that you have had this occur over two batteries it puts a bit of a twist on the situation. If the problem was 100% evident even with the new batteries (within a week or less), then we would suspect a problem on the vehicle (draining alternator, ETACS waking up randomly, etc); if the problem was temporarily resolved (more than a week) when the battery was replaced each time, it iquite likely you just have been running into low quality batteries.