[peva]

You might want to get the battery load/capacity tested - like Bili said, it should hold a charge for longer than that (over 20 days according to the FSM). Have the charging system tested also. That can be done by checking for between 13.5 and 14.5 volts (ambient temperature dependent - closer to 13.5 at warmer temps., closer to 14.5 at colder temps.) with the engine running above 2000 rpm with some loads turned on (headlights on hi beam, cabin fan on high speed). If batt. and alt. test out, check quality of connections at battery, at pos. and neg. jump posts, and the hot power wire stud nut at the starter.

 

[peva]

check the pos and neg connectors at the battery itself......not the remote connectors...

The jump post connections have been known to cause problems too, though the connections at the battery posts are more prone to heavy battery acid corrosion (out of sight, out of mind - until they give problems).

 

[peva]

You can't just look at the jump post connections and tell much about their condition. But hopefully whoever is checking it out for you will get to the root cause and get it fixed right.