ScubaMarc
Contributor
You can and should carry your batteries into Mexico in your checked luggage. I bring my dive lights unloaded and the batteries in new sealed packaging.
I don't bring any of them home. I give all my leftover batteries to the dive shop before I leave.
The issue we have is when we fly to mexico with a US layover and have to change from domestic to international. We need to swap out the batteries from my carry on to my luggage.