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Powering Our Silverado Project With Odyssey Extreme Series Batteries

1,500 Cranking Amps of AGM Deep Cycle Goodness.

Apr 28, 2021
It's not the most glamorous part of any project, but a high-quality battery is arguably one of the most important. From starting the engine to powering accessories, a truck's battery is one of the hardest-working components. Add in the stress from starting a high-performance, high-compression diesel engine; the added demands of high-power electrical accessories such as lights, stereo, and winch; and the harsh environment they operate in, which is filled with intense heat and vibration, and it's easy to see why having the best battery is important.
It's hard to argue with the fact that Odyssey's Extreme series batteries are among the toughest and most powerful on the market. Odyssey Battery is celebrating its 25th anniversary this year, and it's easy to see why. Odyssey's Extreme series batteries are an absorbed glass matt (AGM) design and are non-spillable (meaning they can be mounted in almost any position). Odyssey uses 99 percent pure lead plates, not a lead-alloy, which means they can be made thinner, which allows more plates in the same size case. More lead plates means more power capacity, with Odyssey claiming nearly double that of a comparable conventional battery. Compressed AGM plate separators help the battery resist the harm that extreme vibration can cause, which is one of the more common causes of premature battery failure. Odyssey batteries come with a full four-year warranty (not prorated), have a three- to 10-year service life (depending on application), and can be stored for up to two years without needing a recharge.
For our 2002 Chevrolet Silverado 2500HD project, we opted for a pair of Odyssey Extreme series ODX-AGM34/78 batteries. These batteries come with both top and side terminals and fit in the factory Chevy mounting locations. They provide up to 1,500 pulse hot cranking amps, 1,250 hot cranking amps, and 850 cold cranking amps of starting power. And these batteries have an impressive 134 reserve capacity minutes. After fighting constant issues with the truck's previous deep-cycle batteries, we're excited every time we hit the ignition and hear the big Duramax diesel V-8 quickly roar to life. And hopefully we'll get a decade of reliable service from these Odyssey Extreme series batteries. We'll report back how they are performing, hopefully in 2031.
Photo 2/7   |   001 2002 Chevy Silverado 2500hd Odyssey Battery
Our 2002 Chevrolet Silverado 2500HD has been a long-running project. With a built Duramax diesel V-8 engine, BDS coil-over conversion lift kit, and 37-inch Nitto tires, this truck is a lot of fun. What's not a lot of fun, however, was fighting near-constant battery issues, which we seem to have solved by switching to the Odyssey Extreme AGM batteries.
Photo 3/7   |   002 Odyssey Extreme Series Agm Battery
Most heavy-duty diesel pickups need two standard batteries to provide enough amps to crank over their high-compression engines. Although we could have theoretically gotten away with a single Odyssey Extreme battery, we opted to keep the pair for even more power.
Photo 4/7   |   003 Odyssey Extreme Series Agm Battery
Odyssey offers two lines of AGM batteries: Performance and Extreme. Both the Performance and Extreme series of batteries are built with the same technology, but the Performance series lacks the high reserve capacity and cold cranking amps of the Extreme series.
Photo 5/7   |   004 Odyssey Extreme Series Agm Battery
The Odyssey Extreme batteries that we opted to install for our project come with an 850 cold cranking amp rating, a 1,250 hot cranking amp rating, and a 1,500 pulse hot cranking amp rating. They also have a 134-minute reserve capacity each and weigh just under 50 pounds.
Photo 6/7   |   005 Odyssey Extreme Series Agm Battery
We installed the passenger-side battery on our 2002 Chevrolet Silverado 2500HD with the factory side terminals as normal, and we left the top posts covered. These Odyssey Group 34/78 batteries fit perfectly in the factory battery trays and use the factory battery hold downs with no adapter needed.
Photo 7/7   |   006 Odyssey Extreme Series Agm Battery
On the driver side, we installed the Odyssey battery with the factory side terminals in addition to using the top posts to power accessories such as our aftermarket lift pump. Doing this keeps the factory side terminal connections clean and tight. For applications that use side terminals from the factory, we really appreciate the option to have both terminal types available.

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