Battery Terminal Cleaning Brush: https://amzn.to/2ssvVBF (Amazon Affiliate)
Permatex 80370 Battery Protector and Sealer: https://amzn.to/35gI89I (Amazon Affiliate)
Here is the 450 CCA battery I installed: https://www.batteriesplus.com/productdetails/battery/car-and-truck/honda/civic/2006/l4-1.8l-435cca/sli51r
This is the 500 CCA battery: https://www.batteriesplus.com/productdetails/battery/car-and-truck/honda/civic/2006/l4-1.8l-435cca/sli51rm