You don't need to because it should hold its charge for several months but why take a chance? Individual preference. I use a Battery Tender vice a trickle charger which could over charge i.e. destroy your battery, over a longer period of use.
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"America.... still builds rockets!"
Vette: 355 cid, 400 rwhp
'13 CTS-V Coupe: 6.2L LSA, 556HP
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