Does Costco sell interstate batteries?
As of May 2025, Costco’s battery inventory varies by location and partnership agreements. While Interstate Batteries is a major automotive battery brand in North America, Costco primarily sells its Kirkland Signature automotive batteries through warehouse clubs. These are manufactured by Clarios (formerly Johnson Controls) and carry comparable specifications to Interstate’s products.
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What automotive batteries does Costco carry?
Costco focuses on its Kirkland Signature automotive batteries with group sizes 24, 35, and 65. These offer 36-48 month warranties and CCA ratings from 640 to 850, competing directly with Interstate’s MT series. Pro Tip: Check your vehicle’s BCI group size before purchasing—Costco offers free installation compatibility checks.
Kirkland batteries utilize calcium-alloy grids for reduced water loss, achieving 99.97% recombination efficiency. Their absorbent glass mat (AGM) versions handle 2× deeper cycles than standard flooded batteries. For example, the Group 35 battery delivers 650 CCA at -18°C, sufficient for most mid-sized SUVs. Transitionally, while Costco doesn’t stock Interstate-branded units, their batteries share equivalent performance characteristics at 15-20% lower prices.
How do Kirkland batteries compare to Interstate?
Kirkland and Interstate batteries both use calcium-lead alloy technology but differ in warranty structures. Interstate’s MT-7 series offers 30-month free replacement vs. Kirkland’s 36-month full warranty. Deep cycle performance favors Kirkland AGM models with 400+ cycles at 50% DoD.
| Feature | Kirkland Group 35 | Interstate MT-35 |
|---|---|---|
| CCA Rating | 650 | 640 |
| Reserve Capacity | 100min | 95min |
| Price (May 2025) | $109.99 | $129.99 |
Practically speaking, Kirkland batteries provide better cold-cranking amps per dollar—a crucial factor for drivers in northern states. But what about availability? While Interstate has 300+ distributors, Kirkland batteries remain exclusive to Costco warehouses.
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FAQs
Yes, all Kirkland Signature batteries come with Costco’s standard satisfaction guarantee—returns accepted within 36 months with receipt.
Do Costco batteries fit European vehicles?
Mostly for Asian/American models. Check BCI group sizes—Euro-spec cars often require H6/H7 AGM batteries not stocked in all warehouses.
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