I have a 2003 Voyager 2.5 Diesel, only had the car approx 6 weeks.

Initially car was fine until a few weeks ago it has not started and has to be jump started and then it will be fine for a while but has not started now 3 times, each time jumping the car has sorted it (albeit temporarily)

My initial thought was the battery, however not knowing much about Chryslers is there anything else I can check first before forking out on a new battery?

Thanks all.

 

get the battery tested would be the best start not just replace it. If it passes you would need to do a battery drain test and charging test. come back with the results if you need more help.
If you only do short trips you don't want a red top (Gell) battery but a lead acid battery instead.