Wiring up batteries in series ...that have different mA ratings

My current project requires me to wire 6 AA batteries in series. I need 9V for my project.

Here's the problem. I only have 3 AA battery holders, but I have 3 AAA battery holders. I know mA is constant when wiring batteries in series, but what if each battery has a different values?

Will it matter if I wire 6 batteries in series, 3 being AA & 3 being AAA? Both AA & AAA have 1.5V.

I'm only going to assume that the "life" of the battery will be cut down.

Thanks!

Different types in series will work to some extent, but when the weaker ones start to die, the whole chain can do funny things.

Battery holders are cheap, less than a dollar.

The mA hour or capacity rating of the string (not mA rating) will be that of the AAA batteries. If you are serious about the project, get the right batteries, unless you are really poor. That type of batteries are not expensive.

The final product 9V battery pack has the smallest AH rate choose among those cells you used, that means the mA from AAA but not from AA.