I have a car key fob whose batteries recently died. The coin slot says it accepts two cr2025 coin cell batteries.
But I was thinking, since a majority of coin cell batteries run at 3v, I should be able to simply substitute the battery with the biggest capacity available. So in this case I could use a cr2032.
Fortunately, the bigger batteries fit in the key fob.
But are there any side effects to using bigger capacity batteries in place of smaller capacities?
I heard rumors that bigger batteries demand more current consumption from the load, or else the chemical reaction inside the battery will slow down, thus making the battery life shorter(assuming the load has a p-channel MOSFET to cut power from the load and a button to turn on the power).