Costco batteries?
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Fleet Mechanic
Joined: Feb 2023
Posts: 1,924
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Costco batteries?
Anyone here buy the Kirkland batteries from Costco and just get them replaced before the 48 month free replacement warranty is up? Seems like a no brainer for us diesel guys no!
"Warranty: 48 month free replacement period, 100 months prorated"
EDIT: Return based on SOH being 80% or lower.
"Warranty: 48 month free replacement period, 100 months prorated"
EDIT: Return based on SOH being 80% or lower.
Last edited by wpg_250; Nov 4, 2025 at 07:50 AM.
Fleet Mechanic
Joined: Mar 2023
Posts: 1,586
Likes: 928
I've used Costco batteries several times (but they said "Interstate" on the side, not "Kirkland"). They all worked fine and lasted a normal service life, never needed to warranty one of them.
Really the only batteries I've had issues with are Napa Legend conventional lead -acid batteries (but those were Covid era Napa legend batteries, so maybe I just got four bad ones, but I'm not buying any more Napa legend batteries to figure that out).
If you're looking for cheap, I've had good luck on a few things with Deka AGM batteries from RockAuto. Warranty would be hard (because mail order) but I've put those Deka AGMs in a few daily drivers and some stuff which sits for long periods of time (like my tractor) and they've been pretty good so far.
...
Really the only batteries I've had issues with are Napa Legend conventional lead -acid batteries (but those were Covid era Napa legend batteries, so maybe I just got four bad ones, but I'm not buying any more Napa legend batteries to figure that out).
If you're looking for cheap, I've had good luck on a few things with Deka AGM batteries from RockAuto. Warranty would be hard (because mail order) but I've put those Deka AGMs in a few daily drivers and some stuff which sits for long periods of time (like my tractor) and they've been pretty good so far.
...
Last edited by Antonm23; Nov 7, 2025 at 11:10 AM.
Tuned
Joined: Jan 2019
Posts: 329
Likes: 79
From: Southern California
The only batteries I buy at Costco are GC2 6 volt batteries for my motorhome. For my I vehicles normally buy them from Walmart they hold up well and Walmart is everywhere if there is a problem with them. A few years ago I bought two AGM batteries for my F450 still going strong. Truck is not a daily driver so I keep them on a NACO charger when not driving it. Walmart batteries use to be made by Johnson Controls, may still be.
Mountain Pass
Joined: Jun 2006
Posts: 114
Likes: 30
From: Bastrop
I continue to use the Interstate AGM batteries from Costco with very good luck. I live in a warm climate so that likely helps too. None last forever in our trucks though. Just another item on the regular investment list to keep them running.
4wd Low
Joined: Aug 2019
Posts: 13
Likes: 16
From: Woodbridge, VA
Anyone here buy the Kirkland batteries from Costco and just get them replaced before the 48 month free replacement warranty is up? Seems like a no brainer for us diesel guys no!
"Warranty: 48 month free replacement period, 100 months prorated"
EDIT: Return based on SOH being 80% or lower.
"Warranty: 48 month free replacement period, 100 months prorated"
EDIT: Return based on SOH being 80% or lower.
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jsludlum2
1999 - 2003 7.3L Power Stroke Diesel
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