Trickle charger recommendations

[Matt99man]

I have noticed that when my chim has not been used for a week or so it does not turn over as well. It always starts, I'm thinking with summer waving good bye usage will be more infrequent and a trickle charger is required. So what's a good choice? I want to be able to charge from the cigar lighter socket possible. I have a late 98 if it makes any difference!

[Matt99man]

Am I able to charge from the cigar lighter as standard or does this require some sort of mod?