I recently had a welder come out and put a battery
box holder on the tongue of my trailer. (Along with the furnace
.. this thing had no 12v system.. I re-installed one)
Anyway, that was just a week ago. I KNEW I needed to add drain holes to the bottom of the box, but in the confusion of roughing things in, I forgot.
Fast forward to today. Its been raining and a little snow for 3 days straight. I went to button up everything so I can tow tomorrow. Removed the lid to the box and found it full of water..up to about an 1/8th inch below the top of the battery
. I CAREFULLY removed the cables and pulled the battery
without incident. Dumped the water and managed to get the drain holes drilled and all is safe now. Another hour of rain.. my trailer may have been glowing.
Those of you with tongue mounted boxes.. make sure it can drain! I understand why they do not come pre drilled, its up to you to make it safe.