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2006–2015 Mazda MX-5 Miata Battery FAQ's

Please read our FAQs page to find out more.

Where is the NC battery and what size works best?

The battery is located in the engine bay. A Group 35 or Miata‑specific AGM fits well; lightweight AGM or lithium options reduce nose weight and sharpen turn‑in.

Do I need a vent tube like NA/NB cars?

Not for sealed AGM/lithium units mounted in the bay. Ensure a secure tie‑down and heat shielding if located near exhaust components.

Is a maintainer helpful for a weekend NC?

Yes—modern ECUs draw small current. A smart maintainer prevents low‑voltage starts and extends battery life if the car sits for weeks.