Group 34 Battery Heat Shield Sleeve

For any type of battery under the hood of your vehicle, heat is your biggest enemy, especially if the battery sits directly above the exhaust manifold. Under-hood temperatures can climb fast — especially on long highway drives. When a lithium battery gets too hot, it protects itself by turning off, which means your fridge, lights, or other accessories suddenly lose power at the worst possible time.

This heat shield sleeve is made by DEI (Design Engineering, Inc.) from their proven multi-layer elastomer laminate material. Simply drop your Group 34 battery into this sleeve before placing it in the tray. With the same temperature probe inside the sleeve in the same location, the results were dramatic:

• City driving: Temps barely climbed above 90°F
• A couple hours of highway driving: Maxed out around 119°F
• All-day highway driving: Peaked at just 129°F — well below the shutdown threshold

That's a drop of 38°F or more in real-world conditions. The difference between a fridge that keeps running on a long road trip and one that shuts off in the middle of the day.

The sleeve is flexible, easy to install, and is rated to withstand a 1,500°C flame for 30 minutes, so it's built for serious under-hood heat. It also provides electrical insulation with a dielectric strength of 6Kv DC, adding an extra layer of protection around your battery.

Designed specifically to fit Group 34 sized batteries. 

If you live in a hot-weather region, this sleeve will dramatically extend the run-time of your lithium battery under the hood. Also helps extend the lifespan of Lead Acid, AGM, or Sodium batteries.