I've never heard that. Just follow the instructions for loading the tune your battery will be plenty fine.
If you can quit now, do it. I've probably spent more on modding my car than the car is worth and there is no end in sight
XCharger HiPo 2.8, JBA shorty headers, Zabteck ported & polished TB, Mac ProChamber, Flowmaster American Thunders, GT500 shocks/struts/strut mounts, GT500 front LCA's, Shaftmasters 4" aluminum d/s