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    1. · Registered
      '07 CR-V EX-L AWD
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      4,217 Posts
      Interesting! I l looked up the 4A designation and it shows a small motorcycle battery. According to the Advance Auto Parts site, the correct battery for the 2020 1.5Lt is the Group Size H5. Most of the online sites do not yet show a listing for this vehicle, and the ones that do show the A4, which is not a BCI number as far as I can find, and also not the correct battery for the car. I'm sure the A4 designation has some significance, but all else I've found shows the Group SIze H5. THe H5 appears to be a bit smaller than the Group 35 but very close. Same on specs.
      Here's a link: Advance Auto Parts - Down for Maintenance .

      That's the only listing they showed for the car. Still, a considerably larger battery than the 51R.
       
    2. · Premium Member
      2017 CRV Touring - Pearl White w Black Interior
      Joined
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      9,837 Posts
      Interesting! I l looked up the 4A designation and it shows a small motorcycle battery. According to the Advance Auto Parts site, the correct battery for the 2020 1.5Lt is the Group Size H5. Most of the online sites do not yet show a listing for this vehicle, and the ones that do show the A4, which is not a BCI number as far as I can find, and also not the correct battery for the car. I'm sure the A4 designation has some significance, but all else I've found shows the Group SIze H5. THe H5 appears to be a bit smaller than the Group 35 but very close. Same on specs.
      Here's a link: Advance Auto Parts - Down for Maintenance .

      That's the only listing they showed for the car. Still, a considerably larger battery than the 51R.
      There is a group class in BCI = 4 Different alpha suffixes then sub classify the battery for a particular application. For example... Group 4 batteries appear in the BCI tables for both 6v and 12v variants.. and are differentiated by a different alpha character to the suffix. The "A" suffix is probably new and as such may not show up in many BCI tables posted on the internet yet... but that will change as the battery class proliferates in consumer vehicles and tables get updated.

      The key characteristic of Group 4 = classified for heavy duty use, historically for tractors. So.. I imagine the battery companies simply leveraged that core design and modified it from there for consumer motor vehicle use.

      Group 4 should perform better long term in an auto start/stop vehicle by virtue of it's heavy duty design, compared to the big H5s Honda quietly slipped into newer Hondas sporting the 1.5T in the last couple years. I like the H5 battery class a lot.. and have been very pleased having one as the stock battery in my wifes 2018 Accord with a 1.5T.

      I do think the Group 4s represent a better battery group for repetitive stop/start cycles of newer vehicles. The thing I do not know though is how a Group 4 battery will perform in terms of life expectancy if the owner always disables the auto start/stop feature each time they drive. Time will tell.
       
    3. · Registered
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      19 Posts
      Interesting! I l looked up the 4A designation and it shows a small motorcycle battery. According to the Advance Auto Parts site, the correct battery for the 2020 1.5Lt is the Group Size H5. Most of the online sites do not yet show a listing for this vehicle, and the ones that do show the A4, which is not a BCI number as far as I can find, and also not the correct battery for the car. I'm sure the A4 designation has some significance, but all else I've found shows the Group SIze H5. THe H5 appears to be a bit smaller than the Group 35 but very close. Same on specs.
      Here's a link: Advance Auto Parts - Down for Maintenance .

      That's the only listing they showed for the car. Still, a considerably larger battery than the 51R.
      rockauto recomendation..... More Information for EXIDE MX51R
       
    1. · Registered
      2020 CR-V Touring 2WD
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      428 Posts
    2. · Premium Member
      2017 CRV Touring - Pearl White w Black Interior
      Joined
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      9,837 Posts
      Adavance Auto Parts says this AutoCraft is a direct replacement.


      AutoCraft Platinum AGM Battery, Group Size H5, 680 CCA
      Exact Fit for your 2020 Honda CR-V Touring
      3 YR FREE REPLACEMENT

      Part # H5-AGM


      View attachment 139149
      I went to the site you linked, plugged in a 2020 CRV Touring with 1.5T engine AND 2020 Touring Hybrid .. and it says the battery you linked DOES NOT FIT.

      Be careful and meticulous here... due to the auto start/stop nature of the 2020s. Online sites are notorious for being wrong on things like battery size when a new battery group hits the consumer vehicle market. The 4A appears to be pretty new on the market.

      If you look up the specs on the H5 and the 4A... they are NOT identical. They are roughly the same size and mass, both are 12v batteries, and a similar Amp/hr rating ... but that is where the similarity ends. With the very deliberate lower CCA in the 4A.. it is clear that it has a more robust plate design internally, compared to the H5s. Anyone with a 2020 with autostart should stick with the specified 4A, unless Honda actually specifies an alternate.

      The H5 however would be a great choice for replacing an existing 51R in a pre-2020 CRV ... since the H5 is what Honda moved to a couple years ago on Accords and Civics with the same 1.5T engine in them. It is a better fit and choice over group 24s, which have been a popular replacement for the 51R by some owners.
       
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