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Bosch

Bosch S6523B S6 Flat Plate AGM Battery

Based on 90 reviews
Condition: New
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$303.47
Save $96.85 was $400.32

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At a glance

Condition
New
Model
S6523B
Dimensions
11"D x 11"W x 10"H
Weight
18.46 lb
Vehicle Service Type
Passenger Car
Voltage
12 Volts
Automotive Fit Type
Vehicle Specific Fit
In the box
Flat Plate Battery

Features 5

  • Maintenance free and spill proof battery construction for carefree usage
  • Enhanced charge acceptance for faster re-charging even under extreme conditions
  • Up to 2x longer life vs. conventional batteries via Energy Life technology
  • 4 year free replacement warranty included

Description

This maintenance free, spill proof Bosch S6 AGM battery provides greater energy and deeper cycle capacity as well as extended shelf life and greater charge acceptance/recharge capability compared to conventional flooded batteries. AGM batteries have a high vibration resistance, no freezing potential and are the only choice for Start-Stop applications. With Bosch Energy Life Technology this battery is the perfect choice for your vehicle to drive carefree the whole year.

Specs 18

Brand Bosch
Vehicle Service Type Passenger Car
Voltage 12 Volts
Battery Cell Composition Lead-Acid, AGM
Item Weight 18.46 Pounds
Product Dimensions 11"D x 11"W x 10"H
Number Of Cells 6
Automotive Fit Type Vehicle Specific Fit

Frequently asked questions

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Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Top Amazon Reviews

FIRST CLASS BATTERY
I put this battery in my Suzuki Sidekick that hardly gets driven, but it still started in low teens after sitting up! First Class.
Reviewed in the United States on February 16, 2026 by Jerry Scafidel
Stop start, stopped working in one year.
I purchased because it fit my vehicle. It has starte stop feature. The start stop feature worked in my 2019 Subaru forester for about a year. The battery test says all good and strong enough to stop and restart the vehicle. But it’s not strong enough to work after the car has been driven about an hour. It will start if I stop and start it but the start stop feature stops working after about an hours regular drive with no traffic. I don’t suggest this battery. ... show more
Reviewed in the United States on December 17, 2025 by Reviewer guy
Great battery, so far so good.
Installed this battery 2 weeks ago in my Subaru forester to keep her going through the bitter northern Montana winter. Right away I noticed the engine cranks over much faster when starting. So far the weather's been pretty mild with a few mornings around 10F. The battery's been doing great- on those colder mornings the engine cranks over just as fast as in warmer weather and starts the subie right up. I can't speak for how the battery holds up over the long run, but let's hope it just keeps doing the same as it is now! **Update as of 11/20/23** All I can say is that this has been one incredible battery! It's now nearly 9 years since I put this battery in my Subaru Forester. I never expected it to last this long- 4 brutal winters in MT and 4.5 more, somewhat less brutal, in central WA and this battery is still rockin!! I've never charged it once, as it's never gone dead. It is, however, cranking over more slowly on cold mornings, so I'm considering changing it out with a new Bosch AGM battery to see if I can get 9 more years of reliable service out of the ole Subie (currently 290,000 miles!). I can't speak to all Bosch AGM batteries, but this particular one has been remarkable in its longevity! ... show more
Reviewed in the United States on November 22, 2015 by Noel F
Better than a normal battery
After installing the battery on my old beater I used the car for a month and someone hit my car. I kept the car but it sat while the guy that hit it worked on it for months. I’m honestly surprised it still started with no problem. Fantastic battery and it holds a charge very well. I can’t imagine it leaving me stranded ... show more
Reviewed in the United States on March 9, 2025 by Kevin
Battery arrived 1-day earlier than promised
Only 4-stars as I've not actually installed this year. Have been enduring so many car not starting issues with this 2011 V6 Toyota RAV I got about 1 1/2 yrs ago with less than 45,000 miles. Bought a new battery. Didnt matter. A week later it was dead. Had to call tow service so many times I had to up my membership to gold to allow for 12 road service calls a yr. Even had to have the car towed to the nearest dealer 85 miles away and back. Everyone said cant find a thing wrong with this car. Really!? So all cars of this make just eat batteries and dont start? Lovely. Ended up getting a trickle charge put on the battery to plug into the wall anytime I'm not driving it. Oh yeah, was told it was my fault that I dont drive it enough to charge the batteries. Read from a mechanic that 9x out of 10, he has to replace batteries on Toyota RAVs and their Van, due to a parasitic drain caused by the power steering set up. So, hoping this battery can enable me to pull the plug on my car as having to be plugged in certainly can put a limit on where you can go with your car. If this battery cant save it, next is selling it. Dont look forward to that. ... show more
Reviewed in the United States on April 2, 2019 by inCatnito
Bateria defectuosa!
I don't know what happened to the battery, but it stopped working before the year was up. If you could replace it, that would be perfect!
Reviewed in the United States on September 30, 2025 by Bryan Aldair
Love AGM Batteries but not as of 6-2020
My last car had a Sears AGM battery that went 5 years+. That was a great battery. I've only had this battery for several weeks now but I'm pretty happy with it so far. I like this one for two reasons. First, it has a built in handle that basically folds down into the battery so that it is out of the way. With other batteries, AGM or regular, they seem to have a built in strap that arcs over the top of the battery so either you're going to have to cut it in order to get a top battery bracket to mount in place or be lucky enough that the battery strap can be positioned out of the way. If you end up cutting the strap, you'll have a tough time removing the battery if it becomes necessary for one reason or another. Secondly it has more reserve power than the standard battery that it replaced. I run quite a few accessories and I find this to be a bonus. If I had a complaint, it would be that the battery is too small for my battery tray even though I installed the recommended group (size) battery. It's being held firmly in place by the battery bracket but I would have felt better if the battery's footprint matched the tray. Update 6-2020: The battery has failed after 4 years. I'm a little disappointed by that since you pay a premium for an AGM battery. My last AGM battery went 5 years+. The only reason this battery died was because my truck sat in my driveway for several weeks during the COVID-19 quarantine and no matter how much I drove it after I jumped-started the battery, it would die a day or 2 later. This happened repeatedly. I see it's currently available on Amazon, for a while it wasn't At that time I had ordered a Northstar battery from Amazon (see my review- stay away). AGM batteries are great if you run a lot of accessories and they also have a lot of cold cranking amps. If you have a big engine or a high compression motor or just need to be able to start your car up on a cold winter day this battery is more expensive but I had hoped it would have delivered longer service. -------------------------------------------------------------------------------------------------------------------------- I rely heavily on reviews when I make purchases so I put some time into reviewing everything I buy on Amazon for personal or business use so I can help other people considering that item. If you found my review helpful, please consider hitting the "helpful" button below when it asks if the review is helpful. Thank you! ... show more
Reviewed in the United States on July 10, 2016 by Invoxicated
Bosch battery
Battery arrived on time as promised and was used to replace the old battery in my vehicle. This battery was an upgrade and is operating beyond expectations. I am very happy with the product well worth the money.
Reviewed in the United States on January 10, 2024 by abel
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