MAZDA Miata Battery Deka/East Penn 8AMU1R AGM Made in the USA by Deka/East Penn. Fits all Mazda Miatas from 1990 through 2005 with correct polarity (battery location is in the trunk of the vehicle). Fully Charged out of the box and easy to install. Sealed, Maintenance-Free with a Vibration Resistant Design. Environmentally friendly: 100% recyclable, leakproof, and spillproof. Vent tubes use 1/4" inch OD vacuum tubing.