Battery Dies

[Fritzaferd]

With nothing on our battery dies within 24 hr. This is a brand new Keystone passport 216 SL RD

[Canonman]

A little more info might help. Is this a new problem? Did the battery hold charge before?
Assuming the battery is good, something is drawing current to discharge the battery. Finding what it is can be a fairly simple troubleshooting process. First thing is to verify the condition of the battery. Do you have access to a digital volt/ohm meter? Are you comfortable with some basic troubleshooting?

[Fritzaferd]

This is a brand-new trailer and it happened the first time we tried to use it. Went out to hookup trailer and electric jack would not work. Plugged it to electric cord, recharged, unplugged less than 24 hrs, dead again. Took back to dealer for this and additional warranty
issues. Dealership says battery fine. Suggested TV Booster and then said the was no TV booster. This is a Passport SL 216 RD.

[Canonman]

So they test the battery and found no problem. That leaves some device drawing power from the battery over a fairly short period of time (overnight). I'm going to bet they didn't troubleshoot "why" the battery is losing charge overnight.
Are you up to using a VOM for some basic troubleshooting?