If I use the two AA batteries (shown below) in a digital camera (where two are needed) will I experience any odd behavior due to the difference in mAh, such as:

1. camera not working properly?
2. battery power being dissipated more quickly?

Can you think of any other adverse issues that I might experience?

Also, is mAh (milliAmpere hours)?
What is the h denoting?

[![energizer AA batteries](https://i.stack.imgur.com/DAUdT.png)](https://i.stack.imgur.com/DAUdT.png)