I can only speak on the Odyssey. My battery was 6 months old and I broke my ankle and it sat in my 2004 Nissan Frontier V-6 for 5 months without starting. It turned over quickly & strong. It's correct you get what you pay for.

Odyssey definitely uses better materials and designs, the most important being virgin lead. The DieHard battery likely uses recycled lead. I would bet the main issue was that the DieHard may not have been fully charged before installation (happens a lot more than it should). On top of that, most newer vehicles use a smart charging system that does not charge the battery to 100% SOC (usually only 80%) and only charges at certain voltages when it thinks the battery needs to be charged based on driving habits and current consumption, all to maintain that 80% SOC. Vehicles with these systems that only take short trips do not drive long enough to replenish the current taken from the battery to start it (especially in the cold), not to mention all the accessories used immediately after like lights, heater, heated seats, etc. Heating elements require a lot of current so cold weather is definitely a strain on batteries, especially if they’re not being charged and maintained properly.

Completely invalid analysis. Power - you would have to measure the Voltage AT the CCA load and then multiply those. Using the no load Voltage makes no sense. DB - BSEE 1978

The ones with the gray case were mexican made, and had a high failure rate. Advance switched to a german manufacturer, these have a black case (at least this was the case for the group 49 agm platinums), and the quality control are much better on these. Would like to see these updated units tested.

DIE HARD BATTERIES SUCK I HAD TO REPLACE THEM MUTIPLE TIMES

I just bought the Odyssey Extreme AGM 34/78 PC1500 for my 1998Corvette. I think it will outlast me. 🥃😎

That battery had failed the test you might as well charge it again at a 3 amp setting for 24 to 48 hours and then come back and retest it be sure to check your water levels and your electrolyte levels.

Just purchased the DieHard Platinum AGM 24F Platinum AGM Battery for my 2005 Acura TL.

Let me start out by saying great video Iam in the process of determining what AGM battery to go with and this video is helping in that decision, But! man I don't see any test that you do on the new battery will chalk up to what the old battery endured because from what you say every time it went to work it had that nasty starter knocking it over it's head and in the process damaging it little by little plus the normal wear and tear it endured as with the new battery its designed to work long and hard in the cold heat and normal wear and tear so without the damaging component to the new battery being done your comparison test wont hold true it would need to be tested under the same exact conditions to be fair .

Oddssey batteries love high amps while charging but you can’t exceed 14.7 volts or you will damage battery .So be careful when choosing chargers that don’t exceed 14.7 volts , but they love 25 amps or higher and will charge very quickly.

I installed a Diehard Platinum battery in my truck 8 yrs ago before moving from my warmer home state of Texas the Colorado Rocky Mountains...well, the foothills but close enough. During this time the truck has been burred in snow many times, experienced negative degrees countless times, driven roughly 40k miles, and the lights or dome lights left on a number of times and I have never had a single issue. Even leaving the dome lights on all night in freezing temps, it fired straight up. The only time I came close to possibly needing to jump it off was after letting it sit parked for several months recently. It struggled a little but eventually fired up. Its not that I believe it needs replaced, but I'm turning my truck into an overlander vehicle and looking into replacing my aging battery, hints why I stumbled across this video. I'm actually excited to hear they still make the diehard platinum battery!

This was actually very informative and helpful on which to purchase thanks my guy 👍🏼

Looked at

thanks for the information! living out of my SUV i was needing a really high quality battery...especially during the colder months in michigan ahead.

How the Odyssey Batteries are made! Just wow! amazing

Trying diehard AGM after dealing with 3 failed ODS batteries all before they should have expired. Wish me luck.

The batteries are not holding their first open circuit voltage during the "CCA" test. Most likely the tester is putting a high load on the battery,then measuring the time taken for the voltage (which drops dramatically during the test)to fall to a predetermined level,probably to something close to 7 volts. The longer that takes,the higher the battery scores on the test.

I think most mechanics test batteries by putting an accurate voltmeter across the battery,operate the starter perhaps with the fuel injection and/or ignition systems disabled and read the voltage after about 10 seconds of cranking. More sophisticated ones would read amps draw at the same time.

Great video and explanation, however it was a unfair test as the DieHard Platinum AGM battery was not fully charged at 12.4 volts. I am going to buy a AGM battery if my 2001 BMW 530i battery ever fails. I am using a PulseTech PowerPulse passive battery desulfator on it to keep it working longer, Pulse Tech states that there patented frequency used to desulfate a battery can extend battery life by up to three times.

My guess is that the Diehard is not all the way full charged while the fancy one is,or at least at a higher percentage of fully charged than the Diehard. The Diehard measuring less than 12.6 volts might be a giveaway. I think one crude test of charge is to put a light load on the battery (like a single headlight bulb)for 3 minutes,remove the load,then wait a prescribed amount of time and then read the voltage of the battery without any load on it.