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I personally use Samsung 50S and RS50. The RS50 or 50XG are the optimal choice in my opinion.
2014 Mazda 3 with 322,000 kms, it's doing fine. I'm still on original engine, transmission and starter. I use it almost daily in traffic. The only problem is that the battery is slightly more costly than a standard one, which offsets the miniscule fuel savings you're getting from the system
I did the same replacements two weeks ago, it took about a week for the battery to recalibrate, definitely am seeing the improvements now.
My battery conked out at the normal time after 6 years. But it still didn’t give me any warning that it was dying. 2019 Mazda 3 here
I do exactly the same tasks and mine don't drain that horribly. For me the battery drains quickly while watching movies and gaming only.
Looks like I'm getting a battery replacement. Very disappointed in Samsung this year.
My brother and I both have/had 6 speed 2015 Mazda3 (me the hatchback, him the sedan), and both of us had terrible issues with the Mazda brand batteries.
These are excellent cars but for some reason the batteries they use are bad. I had a 21 Mazda 3. The battery failed in 2023. They replaced it under warranty. The new battery lasted literally less than 6 months.
Mazda OEM batteries are trash. Always have been. 35 years with Mazda and we stocked a ton of them.
The only time I had issues with my battery was the original one when it was on its death bed. But I remember needing to clean the posts a few times and it would start right up. Never was left with a check engine light but when it acted up it would do weird things here and there.
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In March 2026 on PartReview, battery SAMSUNG were overall better than OEM Mazda.
Battery OEM Mazda and SAMSUNG were equally popular according to data in March 2026.
By vote balance, battery SAMSUNG surpassed OEM Mazda:
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In March 2026, according to PartReview, battery OEM Mazda and SAMSUNG have not taken top places in car-specific ratings. You can help by adding your review about these manufacturers.
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You can also see who is better among other battery manufacturers: OPTIMA or Varta, OPTIMA or Bosch, OPTIMA or OEM Subaru, OPTIMA or OEM Volkswagen, OPTIMA or YUASA.