Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
Your bike will not start, and the battery under the seat is the reason. The honest answer: buy the exact YTX7A-BS size, match the cold-cranking amps (CCA — the burst of power that turns a cold engine over) to your machine, and do not pay extra for a brand name that adds nothing. Two picks below cover almost every buyer, and one of them is the crowd favorite at 4.5+ stars.
This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Every pick here fits the same physical slot, so the real differences are cranking amps, capacity, and how the terminals line up. Below you get the honest split on each, from the sealed AGM workhorses to the fill-yourself acid-pack options that last longest when treated right, laid out so you can pick a ytx7a-bs battery in one pass.
Top Picks
How To Choose The Best YTX7A-BS Battery
A YTX7A-BS is a small sealed lead-acid battery used to crank motorcycles, scooters, ATVs, and similar powersport machines. The model number is a physical size and terminal layout, not a brand. That means the box you receive will drop into the same slot whoever makes it — so your job is to compare what is actually inside.
Start with cold cranking amps, then capacity
CCA is the amperage a battery can deliver for 30 seconds at 0°F, and it is the number that decides whether a cold engine turns over. Higher CCA gives you more reserve for a sluggish start. Capacity, measured in amp-hours (Ah), sets how long the battery can run accessories or sit before it needs a recharge. Serious buyers look at CCA first and Ah second, because a battery can fit perfectly and still be too weak to spin a bigger motor.
Check polarity and dimensions before you buy
Polarity is which side the positive and negative posts sit on. The YTX7A-BS layout is typically positive on the left, negative on the right, and some listings show it as [ + – ]. If your cables reach the wrong way, the battery fits but the terminals do not line up. Confirm the length, width, and height match your old battery’s footprint so the hold-down bracket closes cleanly.
Sealed AGM versus fill-it-yourself
A sealed AGM (absorbed glass mat) battery comes ready to install and never needs water. A “bottle supplied” battery ships dry with an acid pack you pour in yourself — it is fresh the day you activate it, but that is an extra step. For most riders the sealed AGM is the easier route; for someone who wants the freshest possible chemistry, the acid-pack version is worth the extra handling.
Side-by-Side Comparison
| Model | Best For | Cold Cranking Amps | Capacity | Weight | Amazon |
|---|---|---|---|---|---|
| Chrome S Pro YTX7A-BS★ Best Overall | Best overall all-rounder | — | 7 Ah | 5.3 lb | Amazon |
| Mighty Max Battery YTX7A-BSBest Value | Best value | 105 CCA | 6 Ah | 5.5 lb | Amazon |
| UPLUS YTX7A-BSBest for Cold Climates | Best for cold climates | 105 CCA | 6 Ah | 5 lb | Amazon |
| Battanux YTX7A-BS | Best for easy install | 105 CCA | 7 Ah | 5.47 lb | Amazon |
| CB CHROMEBATTERY YTX7A-BS | Best for Yamaha R6 | 90 CCA | — | 5.3 lb | Amazon |
| ZIPPBATTERY YTX7A-BS | Budget scooter pick | 90 CCA | 6 Ah | 5.3 lb | Amazon |
| Pirate Battery YTX7A-BS | Budget light pick | 90 CCA | 6 Ah | 3.4 lb | Amazon |
| Interstate Batteries IBX | Premium long-life | 90 CCA | 6 Ah | 5.1 lb | Amazon |
| Yuasa YUAM32X7A | Premium fresh-activation | — | — | 6.3 lb | Amazon |
Detailed Reviews
1. Chrome S Pro YTX7A-BS Maintenance-Free 12V 7Ah Battery
Our pick — 4.5+★ from 350+ verified ratings; the strongest balance of quality and price.
The 7Ah sealed AGM that drops into the widest list of machines without a single spec compromise.
What sells this one is headroom. It holds 7Ah of capacity versus the 6Ah on the UPLUS and Mighty Max below, which buys you more slack for accessories and a little more leeway if the bike sits a while between rides. The sealed absorbent glass mat build — a fiberglass mat soaked in acid so nothing sloshes — means it never needs water and can be mounted at an angle without a spill. It is the same footprint at 5.91 by 3.39 by 3.7 inches, so it slides straight into the YTX7A-BS slot.
Compatibility is genuinely broad here. The listing names the Honda CBR600, Yamaha R6, Suzuki SV650, Kawasaki Ninja 650, and Polaris Predator 500, and it crosses to a long string of part numbers including GTX7A-BS, CTX7A-BA, and MTX7A-BS. If you are standing in a garage holding a dead battery and reading the number off the side, this chart is the fastest way to confirm you are buying the right brick. The build is UL-certified and made to Japanese QC standards, and the 18-month warranty with a 60-day refund window is the longest protection on this list.
Where it gets honest: battery life is the one thing that splits opinion. Some units run a long stretch, but a portion of buyers report the charge fading months in, and a slower charge time comes up too. That is the nature of lead-acid — how you store it in the off-season matters as much as the brand. For a sealed battery you can install in minutes and never top off, this is the pick that fits the most machines.
chrome sealed shell
- 7Ah capacity — a full amp-hour above the 6Ah UPLUS and Mighty Max
- Sealed AGM that never needs water and resists vibration
- 18-month warranty, the longest coverage on this list
- Covers a deep part-number cross-reference chart
price bump
- Battery life is the mixed spot — winter storage habits decide how long it lasts
- No CCA figure published, so you are buying on capacity and fit
chrome finish fans: you ride a sport bike or ATV and want the widest compatibility plus the longest warranty in one box.
budget shoppers: you need a published CCA number to match a spec sheet — check the Mighty Max or UPLUS instead.
2. Mighty Max YTX7A-BS
The cranking-amp specialist: 105 CCA and a low sticker that beats the 90 CCA ChromeBattery by 15 amps.
If your bike is slow to turn over on a cold morning, the number that matters is CCA. This one delivers 105 cold cranking amps against 90 CCA on the CB ChromeBattery and ZIPPBATTERY further down — a real 15-amp edge for stubborn engines. It is a 12V 6Ah sealed lead-acid pack built to handle high discharge rates and deep discharge recovery, so it shrugs off the occasional full drain rather than dying on the spot. Mounting it at an angle is fine because the spill-proof AGM design keeps the acid in the mat.
Two things sell it beyond the amps. It arrives pre-charged and screws are included, so there is no topping-off ritual before it goes in — connect it and you are riding. And it sits at the affordable end of the sealed set, which is where the value really lands: owners consistently call it a great deal for what it delivers. The footprint is 5.90 by 3.38 by 3.70 inches with positive on the left, negative on the right, matching the standard YTX7A-BS layout. It weighs 5.5 pounds, a touch heavier than the 5-pound UPLUS.
The honest catch is holding a charge over the long haul. While plenty of units crank fine, some owners find the battery draining within a week or two if left to sit. For the strongest cold-crank at the lowest price, this is the one to grab.
mighty max value: 105 CCA plus a pre-charged, screw-included package lands it as the value king of the sealed set.
no terminal kit: do not let it sit uncharged for weeks or the life span shortens fast — a battery tender solves it.
cheap replacement: budget-conscious riders who want maximum cranking amps and zero setup fuss.
premium seekers: you want the deepest capacity — the 7Ah Chrome S Pro holds more for longer accessory runs.
3. UPLUS YTX7A-BS Motorcycle Battery EB7A-4-I 12V 6Ah AGM
Built to fire on a sub-zero morning, with 105 CCA and a factory charge ready the day it lands.
This is the pick for anyone who rides into the cold. UPLUS publishes 105 CCA and rates it for low-temperature starting down to -22°F, which is the number that matters when the garage is below freezing. It ships factory-activated and fully charged, so it works the moment it arrives with no acid to pour and no overnight charger session first. The sealed AGM core means no spills, no leaks, and no water to check.
Inside, UPLUS uses 99.99% pure primary lead, which the maker says charges better and releases no toxic fumes versus recycled lead. Physically it is 5.91 x 3.43 x 3.66 inches, its 3.43-inch width a hair over the 3.35 inches on the Battanux. At 5 pounds it is lighter than the 5.5-pound Mighty Max above. The [- +] terminal layout matches the YTX7A-BS standard, and it crosses to a long OEM list including CTX7A-BA, GTX7A-BS, and MTX7A-BS.
What wins people over is plain performance — it starts the machine first try across ATVs and scooters, and the fit lands right. The trade-off is the smallest owner base here, so you are relying more on UPLUS’s own testing than on a long track record. There is a 15-month warranty with a 30-day refund window and a California-based support team. For cold-weather confidence and a factory charge you can trust, it earns the spot.
light power draw: your riding season runs into freezing temperatures and you want guaranteed cold-crank muscle.
high amp needs: it is the priciest of the 6Ah sealed group, so if you never ride cold, the Mighty Max saves you cash.
4. Battanux YTX7A-BS Battery 12V7Ah Sealed SLA/AGM
A 7Ah pack with 105 CCA that arrives charged and slots in with no tools needed for installation.
Here is the rare combination: the bigger 7Ah capacity of the Chrome S Pro with the 105 CCA of the Mighty Max. That pairing gives you both cranking punch and accessory headroom in one 5.47-pound brick. It is rated at 72 watts and 12 volts, built with SLA/absorbed glass mat internals for spill-proof, low-maintenance running across a wide temperature range. Battanux says 90% of the battery is recycled at end of life.
The install story is the selling point. It ships fully recharged and ready to connect, so there is no waiting — you wire it up and go. The footprint is 5.91 x 3.35 x 3.70 inches, its 3.35-inch width the same as the Chrome S Pro and slightly narrower than the 3.43 on the UPLUS. It replaces GTX7A-BS and ETX7A-BS, and the listing reminds you to match size and polarity: [ + – ].
The trade-off is build consistency. While plenty of units run reliably — one owner fires a 3kW inverter generator off it with no problem — the quality feedback splits, and a brick that arrives weak is the risk you take at this price. Given the capacity and cranking amps on paper, it is a capable option if you want 7Ah without stepping up to the sealed premium tier.
battanux sealed agm: 7Ah and 105 CCA together — the capacity of the top pick with the cranking amps of the value pick.
thin reviews: quality consistency is the mixed note, so check it holds charge as soon as it arrives.
quiet reliability: buyers who want the most capacity and cranking amps without a premium sticker, and value a pre-charged drop-in.
brand loyalists: you want the longest warranty — the Chrome S Pro backs its battery for 18 months.
5. CB CHROMEBATTERY YTX7A-BS 12V 90 CCA Sealed AGM
The R6 favorite that comes fully charged and ready to wire straight in.
Ask around the sport-bike crowd and this name comes up, especially with Yamaha R6 owners who report it performing exactly as it should. It delivers 90 cold cranking amps — 15 below the Mighty Max and UPLUS, so if you run a big-bore engine in the cold you may want more punch. For a standard R6 or a GY6 scooter, 90 CCA is a perfectly sound match, and the sealed AGM design keeps it spill-proof and vibration-resistant. It is built to Japanese QC standards and UL-certified.
The convenience is real: it arrives fully charged, so there is no charger to dig out — connect your cables and you are set. The footprint is 5.91 x 3.39 x 3.7 inches at 5.3 pounds, matching the standard layout. It fits the Honda Recon 250, Yamaha TTR125, and GY6 50-125cc machines named on the listing, covered by the same 18-month warranty and 60-day refund window as the Chrome S Pro.
The one spot to go in eyes-open is long-term life. Some units run for years while others give out within weeks, which is the usual lead-acid lottery. Keep it on a tender during storage and you tilt the odds in your favor. For an R6 or a small scooter that needs a charged, ready-to-go drop-in, this is a reliable choice.
cold morning starts: Yamaha R6 riders and GY6 scooter owners who want a pre-charged, no-fuss install.
higher cca buyers: your engine is larger or your winters are harsh — the extra amps help.
6. ZIPPBATTERY YTX7A-BS 12V 90 CCA AGM
A no-frills 6Ah starter that gets a small scooter going without draining your wallet.
For a commuter scooter or a GY6-powered moped, this covers the job. It is a 12V 6Ah sealed AGM rated at 90 CCA — the same cranking figure as the CB ChromeBattery, enough for a small-displacement engine that does not need a huge kick. It comes fully charged with nuts and bolts included, so installation is a connect-and-go affair. Being absorbent glass mat, it resists vibration and can sit at an angle without leaking.
The fit is the standard YTX7A-BS box at 5.91 x 3.39 x 3.7 inches and 5.3 pounds, matching the R6 favorite and the Pirate Battery down the list. It fits TaoTao 110 and GY6 50-125cc scooters along with the Honda Recon 250 and Yamaha TTR125. The 18-month warranty and 60-day refund mirror the Chrome brand’s terms, so support is not the weak link here.
Where it asks for patience is consistency. The battery fires scooters right up when it is good, but some units do not hold a charge beyond a day, and a few buyers find the value or fit not what they hoped. That is a fair warning for a budget-tier brick — buy it for a light-duty scooter, keep it tended, and it does the job. If you need guaranteed cold-crank and long storage life, the 105 CCA picks above are the safer bet.
simple swap: small scooters and mopeds where light-duty cranking is all you ask.
upgrade hunters: you want more charge stability — the Mighty Max or UPLUS hold up better over time.
7. Pirate Battery YTX7A-BS 12V 90 CCA AGM
The lightest brick on the list at 3.4 pounds, which matters if you pull the battery often.
Weight is the headline here. At 3.4 pounds this is far lighter than the 5.5-pound Mighty Max or the 6.3-pound Yuasa, so if you regularly yank the battery out for charging or race prep, that saving is welcome. It still packs 12V 6Ah and 90 CCA into the standard 5.91 x 3.39 x 3.7-inch box — the same cranking figure as the CB ChromeBattery and ZIPPBATTERY. The sealed AGM build handles vibration and stays spill-proof.
It lands in a huge range of machines: ATVs, dirt bikes, street bikes, scooters, snowmobiles, UTVs, and personal watercraft all appear on the compatibility list. It arrives fully charged and ready to connect, covered by the same 18-month warranty and 60-day refund as the Chrome-branded options. Functionality is what owners praise most — it just works, the fit is right, and the value is fair for what you spend.
The caution is longevity. Some units run for years, but a share give out early in the season and the battery-life feedback is mixed. That is the trade you make on a light budget brick. For a rider who wants a low-weight, ready-to-go pack across multiple vehicles, the Pirate is a sensible, unfussy choice.
diy installers: riders who swap batteries between vehicles and want the lowest carry weight.
manual readers: early-life failures are the mixed note — store it on a tender and watch it the first month.
8. Interstate IBX YTX7A-BS
The brand-name brick with a built-in flame-arrestor and a no-pour acid pack for the freshest possible fill.
Interstate has been in the battery business for 70+ years, and this pack adds safety hardware the budget options skip. A built-in Safety Flame-Arrestor vents and quenches a spark so the cell cannot ignite, and the active material is compounded to withstand vibration. It is 12V 6Ah at 90 CCA, the same cranking figure as the CB ChromeBattery. It arrives dry with a pre-mixed, no-pour acid pack, so you fill it fresh the day you install and it is permanently sealed after.
The fill-it-yourself design is the freshest chemistry you can get — the acid has never sat activated on a shelf, which is a genuine advantage over a pre-activated battery that may have been in a warehouse a while. It weighs 5.1 pounds and mounts at virtually any angle without leaking. The compatibility list runs wide across motorcycles, ATVs, snowmobiles, jet skis, scooters, go-karts, and personal watercraft, so most powersport riders are covered.
The honest catch is that longevity is the most mixed story here. Some units run months while others drop a charge quickly, and the install being described as a hassle for some buyers is worth knowing before you commit. This is the pick for someone who values a trusted brand name and a fresh fill, and will stay on top of charging. It is not the set-and-forget brick the sealed mid-range options are.
interstate dealer net: a flame-arrestor safety vent, fresh no-pour fill, and a 70-year brand history separate it from the commodity bricks.
costs more: you must fill and charge it correctly, and the life-span report is genuinely mixed across owners.
warranty access: riders who want a recognized brand, the fresh acid fill, and the added safety vent, and will mind the charge schedule.
cheapest option: you want a pure drop-in sealed battery — the Chrome S Pro or Mighty Max need no filling at all.
9. Yuasa YUAM32X7A YTX7A-BS
Advanced lead-calcium chemistry in a fill-yourself pack — and the heaviest build on the list at 6.3 pounds.
Under the lid sits lead-calcium technology, which the maker says holds its specific gravity more than 3 times longer than conventional lead-antimony batteries. It is a maintenance-free AGM (absorbed glass mat — a design that makes the battery nonspillable) with separators that soak up the acid, and a valve-regulated design that eliminates water loss and refilling. The bottle-supplied format means it ships dry with the electrolyte in a plastic container, so you fill it fresh when you are ready to activate.
This is the heaviest battery here at 6.3 pounds, a full pound over the 5.3-pound Chrome S Pro. That heft reflects the denser lead-calcium build rather than a bigger footprint — it is still the YTX7A-BS size with an F1 terminal. The one habit Yuasa insists on is periodic charging when the battery sits unused; this is not a fit-and-forget brick, and its maintenance-free claim covers water, not a charger. Fill it correctly, keep it tended in the off-season, and it is built to serve.
Life-span reports split honestly: some units run 3 to 7 years, while others never hold a charge from the start. That is the gamble with any lead-acid, and the fill-yourself step adds a chance to get activation wrong. This is the pick for the rider who wants premium lead-calcium chemistry and does not mind a short setup ritual. It is the most sturdy metal on this list, priced accordingly.
stock replacement: tinkerers who want lead-calcium durability and will take the time to fill and tend it properly.
tight budgets: you want to open a box and ride — the pre-activated Chrome S Pro skips the whole setup.
Know the Specs
Cold Cranking Amps (CCA)
CCA measures the amperage a battery can deliver for 30 seconds at 0°F without dropping below 7.2 volts. In plain terms, it is the punch that spins a cold engine — higher CCA means a more confident start in winter. The picks here range from 90 CCA up to 105 CCA, a 15-amp spread that matters on larger or colder engines. Match your battery’s CCA to what the old one had or what your owner’s manual calls for.
Amp-Hours (Ah) Capacity
Ah is the total energy the battery stores — think of it as the gas tank size. A 7Ah battery holds more than a 6Ah one, which gives more running time for accessories and more reserve if the machine sits. Capacity does not directly boost cranking power, so a 6Ah with 105 CCA can start harder than a 7Ah with a lower rating. Buy capacity for accessory headroom and CCA for starting muscle.
Sealed AGM (Absorbed Glass Mat)
AGM means the acid is soaked into a fiberglass mat rather than sloshing as a liquid. That makes the battery spill-proof, able to mount at an angle, and resistant to vibration — three things that matter on a bouncing ATV or a leaning bike. It also means no water to top off, which is what “maintenance-free” refers to. Every pick on this list is AGM-based.
Polarity and Terminal Layout
Polarity is which side the positive and negative posts sit on, usually shown as [ + – ] or described as positive left, negative right. If you order the wrong layout, the battery fits the box but your cables cannot reach the posts. The T3 and F1 terminal styles also differ in bolt pattern, so check your existing connectors before buying. Always match both polarity and terminal type to your machine.
Common Questions
Will a YTX7A-BS fit my bike if the old battery had a different brand?
How many cold cranking amps does my scooter actually need?
Is a sealed AGM battery better than a fill-it-yourself acid pack?
Do I need to charge a new YTX7A-BS battery before installing it?
How long does a YTX7A-BS battery normally last?
Can I mount my YTX7A-BS battery at an angle?
What is the difference between 6Ah and 7Ah in a YTX7A-BS?
Why do some YTX7A-BS batteries cost more than others with the same CCA?
How do I check polarity before I connect the new battery?
Will a YTX7A-BS work in both a motorcycle and an ATV?
The Bottom Line
For most riders, the ytx7a-bs battery that earns the top slot is the Chrome S Pro — a 7Ah sealed AGM that fits the widest list of machines and backs itself with an 18-month warranty. If cold starts and cranking amps are what you lose sleep over, grab the Mighty Max for its 105 CCA at the lowest price. And for sub-zero mornings where you need guaranteed cold-crank muscle, the UPLUS is the one to reach for.
Buy on fit and cranking amps first, brand name last — the YTX7A-BS slot is universal, so the specs inside the box are what keep your engine turning over. Whichever you pick, put it on a tender during the off-season and you will get the most riding days out of it.
How we choose
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of November 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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