![Which Optima red top part number with vent? - EvolutionM - Mitsubishi Lancer and Lancer Evolution Community Which Optima red top part number with vent? - EvolutionM - Mitsubishi Lancer and Lancer Evolution Community](http://imgur.com/9Jd1SCV.jpg)
Which Optima red top part number with vent? - EvolutionM - Mitsubishi Lancer and Lancer Evolution Community
All #carbatteries have vent holes in case they are severely-overcharged. The fumes batteries vent in these rare instances are toxic & flammable, so make sure your batteries are vented to the outside
![Optima Marine Blue Top Battery: 31M Group Size, 900 CCA, 1125 CA, 155 Minute Reserve Capacity D31M - Advance Auto Parts Optima Marine Blue Top Battery: 31M Group Size, 900 CCA, 1125 CA, 155 Minute Reserve Capacity D31M - Advance Auto Parts](https://shop.advanceautoparts.com/wcsstore/CVWEB/staticproductimage/N3583/large/16940016_otm_d31m_pri_larg.jpg)