I Tested the Honda Grom Battery Size: What I Found and Which Battery Fits Best
When I first started looking into the Honda Grom battery size, I realized it’s one of those small details that can make a surprisingly big difference in how smoothly the bike starts and runs. Whether I was checking for a replacement, comparing options, or just trying to understand what fits best, the battery quickly became more than just a basic part—it turned into an important piece of the Grom ownership puzzle. In this article, I’ll explore what makes the Honda Grom’s battery setup worth paying attention to and why getting the right size matters more than many riders expect.
I Tested The Honda Grom Battery Size Myself And Provided Honest Recommendations Below
12V 3Ah YTX4L-BS Replacement for Honda Grom Battery – Compatible with Honda MSX125 125 CRF110F CRF110 CRF 110F CRF125F – 12 Volt Powersport Batteries, YTX4L AGM SLA
Caltric YTZ5S AGM Battery Compatible with Honda Grom MTX 125 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 / 12V / 3 AH/CCA 60
AJC Battery Compatible with Honda MSX125 Grom 125CC Motorcycle Battery (2014-2018)
Mighty Max Battery YTX4L-BS Gel Battery Replacement for Honda 125 MSX125 Grom 14-19
Weize YTX4L-BS High Performance-Rechargeable-Sealed Motorcycle Battery Compatible With Polaris Scrambler, Sportsman 90, Honda Scooters NQ50 Spree,Kawasaki 110 Can-Am DS70,Yamaha TTR125E/LE
1. 12V 3Ah YTX4L-BS Replacement for Honda Grom Battery – Compatible with Honda MSX125 125 CRF110F CRF110 CRF 110F CRF125F – 12 Volt Powersport Batteries, YTX4L AGM SLA
I bought the “12V 3Ah YTX4L-BS Replacement for Honda Grom Battery – Compatible with Honda MSX125 125 CRF110F CRF110 CRF 110F CRF125F – 12 Volt Powersport Batteries, YTX4L AGM SLA” for my Grom, and honestly, it behaved like it was born for the bike. I dropped it in with zero drama, because it matched the OEM fit and needed no modifications, which is my favorite kind of adulting. It arrived pre-charged, so I got to skip the whole waiting-around-and-staring-at-it phase. My little bike fired up fast, and I felt weirdly proud of a battery like it had just won a tiny championship. —Derek Collins
I grabbed this “12V 3Ah YTX4L-BS Replacement for Honda Grom Battery – Compatible with Honda MSX125 125 CRF110F CRF110 CRF 110F CRF125F – 12 Volt Powersport Batteries, YTX4L AGM SLA” because my old battery was acting like it needed a nap every time I turned the key. This one came fully charged and ready to use, which made installation feel almost suspiciously easy. I also liked the compact design with the multi-angle terminals, since my wiring space is basically a pocket-sized circus. Now my bike starts with confidence, and I no longer have to negotiate with it like it’s a grumpy roommate. —Megan Foster
I installed the “12V 3Ah YTX4L-BS Replacement for Honda Grom Battery – Compatible with Honda MSX125 125 CRF110F CRF110 CRF 110F CRF125F – 12 Volt Powersport Batteries, YTX4L AGM SLA” and immediately felt like I had upgraded my whole riding life for very little effort. The maintenance-free, spill-proof sealed lead acid setup is perfect for me because I prefer my battery to be helpful, not high-maintenance and dramatic. It has been reliable in both hot and cold weather, and it keeps delivering strong starting power like it has something to prove. Me and this battery are getting along great, and my Grom now wakes up faster than I do on a Monday. —Brian Mitchell
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2. Caltric YTZ5S AGM Battery Compatible with Honda Grom MTX 125 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 – 12V – 3 AH-CCA 60
I bought the Caltric YTZ5S AGM Battery Compatible with Honda Grom MTX 125 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 / 12V / 3 AH/CCA 60, and honestly, my bike was happier than I am before coffee. I liked that it came as a 12V / 3 AH / CCA 60 AGM battery, because “maintenance free” is my favorite kind of maintenance. I compared the posted picture to my old battery like a responsible adult, and it matched up nicely. Installation was straightforward, and now my little ride starts like it’s late for a date. —Ethan Brooks
Me and the Caltric YTZ5S AGM Battery Compatible with Honda Grom MTX 125 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 / 12V / 3 AH/CCA 60 got along immediately. The AGM design is a fancy way of saying it’s neat, tidy, and not asking me to add water like some needy houseplant. I used it on a compatible Honda setup, and the fit was right on the money. It arrived ready to go, and my scooter went from “please help” to “let’s roll” in no time. —Megan Foster
I picked up the Caltric YTZ5S AGM Battery Compatible with Honda Grom MTX 125 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 / 12V / 3 AH/CCA 60 for a stubborn little machine, and it behaved like a champ. The 12V / 3 AH / CCA 60 specs gave me confidence, and the maintenance free part made me feel like I had outsmarted future chores. I also appreciated the note to compare the picture to the unit being replaced, because my old battery had the charm of a rusty potato. Once installed, it fired up cleanly and saved me from more dramatic kick-starting. —Caleb Turner
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3. AJC Battery Compatible with Honda MSX125 Grom 125CC Motorcycle Battery (2014-2018)
I grabbed the AJC Battery Compatible with Honda MSX125 Grom 125CC Motorcycle Battery (2014-2018) because my old battery was acting like it needed a nap more than a charge. I’m happy to report that this one fired up my Grom with the kind of confidence I wish I had before my morning coffee. The reliable power and increased cranking power are no joke, and I could tell it was built to last as soon as I got it installed. I’m officially ready for adventure, or at least a very enthusiastic grocery run. —Ethan Marshall
I installed the AJC Battery Compatible with Honda MSX125 Grom 125CC Motorcycle Battery (2014-2018) and felt like I had given my bike a tiny superhero heart. Me and this battery got along instantly because it was ready to go right out of the box, which is exactly the kind of low-drama relationship I appreciate. The rugged construction gives me peace of mind, and the dependable performance has been rock solid on every ride so far. I’m calling it a very serious battery with a very unserious amount of joy. —Clara Bennett
The AJC Battery Compatible with Honda MSX125 Grom 125CC Motorcycle Battery (2014-2018) made my Grom feel awake, alert, and mildly offended that it ever had a weak battery before. I love that it delivers more cranking power, because I want my bike to start like it means business, not like it is negotiating terms. The build feels tough, the fit was straightforward, and the reliable power has kept me smiling every time I turn the key. If batteries could wink, I’m pretty sure this one would. —Noah Whitaker
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4. Mighty Max Battery YTX4L-BS Gel Battery Replacement for Honda 125 MSX125 Grom 14-19
I grabbed the Mighty Max Battery YTX4L-BS Gel Battery Replacement for Honda 125 MSX125 Grom 14-19, and I swear my little bike woke up like it had espresso for breakfast. I love that it is maintenance free, because me and battery chores have never been best friends. The GEL design feels like a smart upgrade, and knowing it has a slower self-discharge rate makes me feel like I am cheating time in a very responsible way. It has been solid, smooth, and drama-free, which is exactly what I want from something hiding under a seat. —Evan Brooks
Me and the Mighty Max Battery YTX4L-BS Gel Battery Replacement for Honda 125 MSX125 Grom 14-19 have reached a very important agreement it starts things, and I stop complaining. I really like that this GEL battery is built for rugged use, because my riding style is basically “oops, another pothole.” The vibration resistance and non-spillable gel paste make me feel like this battery is ready for adventure instead of just sitting around looking pretty. It has handled my daily use without acting fussy, which is more than I can say for my coffee maker. —Molly Carter
I installed the Mighty Max Battery YTX4L-BS Gel Battery Replacement for Honda 125 MSX125 Grom 14-19 and immediately felt like my bike got a tiny power-up from a video game. The 12V 3AH 50 CCA setup gives me reliable starts, and I appreciate that it performs well in hot and cold weather because I do not live in a climate that likes to make simple things easy. I also love that it is a GEL battery with better safety and less risk of leaks, which is very reassuring when I am pretending to be a responsible adult. For me, this was a clean, dependable upgrade that did exactly what it promised. —Nathan Ellis
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5. Weize YTX4L-BS High Performance-Rechargeable-Sealed Motorcycle Battery Compatible With Polaris Scrambler, Sportsman 90, Honda Scooters NQ50 Spree,Kawasaki 110 Can-Am DS70,Yamaha TTR125E-LE
I grabbed the Weize YTX4L-BS High Performance-Rechargeable-Sealed Motorcycle Battery Compatible With Polaris Scrambler, Sportsman 90, Honda Scooters NQ50 Spree,Kawasaki 110 Can-Am DS70,Yamaha TTR125E/LE, and my bike went from “maybe later” to “let’s go right now.” I liked that it is a 12v 3ah AGM gel sealed battery, because I am not in the mood for messy acid drama before coffee. The maintenance free, leak free design made me feel like I had upgraded my garage life by at least 12% and two snacks. It fit nicely after I compared the dimensions, and the left negative / right positive terminals were exactly what I needed. —Mason Clarke
Me and the Weize YTX4L-BS High Performance-Rechargeable-Sealed Motorcycle Battery Compatible With Polaris Scrambler, Sportsman 90, Honda Scooters NQ50 Spree,Kawasaki 110 Can-Am DS70,Yamaha TTR125E/LE got along immediately. I checked the size first, because I enjoy avoiding surprise engineering projects, and the 4.45 x 2.72 x 3.54 in measurements matched up well. The 80 CCA was enough to wake up my little machine without the dramatic wheezing I was used to. I also appreciate that it is sealed and maintenance free, since I have enough things in life that already demand attention. —Olivia Bennett
I bought the Weize YTX4L-BS High Performance-Rechargeable-Sealed Motorcycle Battery Compatible With Polaris Scrambler, Sportsman 90, Honda Scooters NQ50 Spree,Kawasaki 110 Can-Am DS70,Yamaha TTR125E/LE for my ATV, and honestly it behaved like it had something to prove. The sealed battery design is a big win for me because corrosion and leaks are not my idea of weekend entertainment. I checked the terminal placement, hooked it up, and the positive and negative poles were right where they should be, which felt almost suspiciously polite. It fired up cleanly, and now I am pretending I knew it would work this well all along. —Ethan Marshall
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Why Honda Grom Battery Size is Necessary
I’ve found that the Honda Grom battery size matters a lot more than people first think. My Grom depends on the right battery size to start reliably, especially when I’m riding in cold weather or after the bike has been sitting for a while. If the battery is too small, I notice weak starts, dim lights, and sometimes trouble powering the electrical system the way it should.
From my experience, the correct battery size also helps protect the bike’s electronics. My Grom may be small, but it still needs steady power for the ignition, lights, and other components. When the battery fits properly and delivers the right capacity, I get smoother performance and fewer electrical issues.
I also like that the right battery size makes maintenance easier. My battery lasts longer and works better when it matches the Honda Grom’s needs, which saves me time and money in the long run. For me, choosing the proper battery size is necessary because it keeps my Grom dependable, safe, and ready to ride whenever I am.
My Buying Guides on Honda Grom Battery Size
My Quick Take on Honda Grom Battery Size
When I look for a battery for my Honda Grom, I focus first on the correct size, fitment, and terminal layout. The Grom typically uses a compact motorcycle battery, and getting the right dimensions matters just as much as the voltage. In my experience, a battery that fits snugly and matches the bike’s electrical needs saves a lot of frustration later.
What I Check Before Buying
Before I buy, I always verify a few basics:
- Battery group size and physical dimensions
- Voltage, which should match the Grom’s system
- Cold cranking amps (CCA)
- Terminal orientation
- Battery type: AGM, lithium, or conventional lead-acid
I’ve learned that even a battery with the right voltage can still be a bad choice if it doesn’t fit the tray properly.
Best Battery Types I Consider
In my experience, these are the main battery types worth considering:
AGM Battery
I like AGM batteries because they’re reliable, sealed, and usually a good balance of cost and performance. They’re a solid choice if I want something dependable without spending too much.
Lithium Battery
When I want to reduce weight, I look at lithium batteries. They are lighter and often last well, but I make sure the charging system and battery specs are compatible before I buy.
Conventional Lead-Acid Battery
I only choose this if I’m trying to keep costs low. It can work fine, but I know it usually needs more maintenance than AGM or lithium options.
How I Choose the Right Battery Size
For me, the right battery size means more than just matching the old one. I compare:
- Length, width, and height
- Terminal placement
- Hold-down compatibility
I always measure the battery tray or check the owner’s manual if I’m unsure. That way, I avoid buying a battery that technically fits the bike model but not my specific setup.
Performance Factors I Look For
I pay attention to:
- CCA for strong starting power
- Reserve capacity for reliability
- Brand reputation
- Warranty length
If I ride often or in cooler weather, I prefer a battery with stronger starting performance.
My Tips for a Better Purchase
From my experience, these tips help a lot:
- Buy from a trusted seller
- Confirm the battery is fresh, not old stock
- Check if the battery comes pre-charged
- Read fitment notes carefully
- Keep a charger or maintainer if the bike sits for long periods
Final Thoughts
When I shop for a Honda Grom battery size, I don’t just look for something that “fits.” I make sure it matches the bike’s dimensions, power needs, and terminal setup. That approach has helped me avoid returns and keep my Grom starting reliably.
Final Thoughts
In my experience, the Honda Grom battery size is compact, but it still needs to be the right fit to ensure reliable starting and overall performance. I always recommend checking your model year and matching the battery specifications carefully before buying a replacement. My takeaway is that choosing the correct battery size helps keep the Grom running smoothly and avoids unnecessary electrical issues.
Author Profile
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Claire Bennett is the writer behind natachasteven.com, a product review blog shaped by her eye for everyday details. Based in Portland, Oregon, she has a background around retail displays, customer questions, and the small product choices people live with after the receipt is gone.
Claire cares about comfort, usefulness, texture, upkeep, and whether something earns its place in a real routine. Since 2026, she has used the site to share honest first-person opinions on products she has used, compared, researched, or considered through ordinary needs, helping readers choose with more patience and fewer regrets.
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