The battery in Tarka is from mid 2013, according to the sticker. It will last for about 2 weeks without the trickle charger, but if the radio is left on the battery goes flat over night.
How do I know this, yes, I found out the hard way.....
As has been said, a larger battery, if beyond the capacity of the alternator, won't help.
A trickle charger is the cheapest solution, I feel.
