★★★★★
it's a small battery that works great
john—October 26, 2025
It's a tiny battery but It works great, it was a good price and came on time Read more
ExpertPower
YTX4L-BS YT4L YTX4L YT4L-BS GTX4L-BS GT4L-BS GTX4L GT4L Replacement 12V3AH WPX4L-BS Sealed AGM for Arctic Cat Polaris BRP
$19.99$64.99
About this item
- Full 4Ah Capacity for Stronger Starts – Delivers a true 12V 4Ah capacity, offering more cranking power and longer runtime compared to standard 3Ah alternatives—ideal for motorcycles, scooters, ATVs, and dirt bikes needing reliable ignition.
- High Starting Performance – 120 CCA Output – Equipped with 120 Cold Cranking Amps (CCA) for quick, dependable starts in a variety of weather conditions, ensuring powerful ignition during cold mornings and rugged riding conditions.
- Compact & Lightweight OEM Fit – Precisely sized at 4.44" (L) x 2.75" (W) x 3.34" (H) and weighing only 2.87 lbs, this battery fits seamlessly into OEM battery boxes for powersport models using YTX4L-BS, YT4L, GTX4L, GT4L, and WPX4L-BS replacements.
- Maintenance-Free, Sealed AGM Design – Absorbed Glass Mat (AGM) technology ensures a spill-proof, leak-proof, and vibration-resistant build. Fully charged and ready to install—no water top-offs or acid handling required.
- rusted ExpertPower Quality & Warranty – Backed by ExpertPower’s commitment to performance, with a proven track record in powersport and backup battery systems, plus dedicated customer support for peace of mind.
$19.99
Was $64.99Save $45.00
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Product details
| Brand | ExpertPower |
|---|---|
| Vehicle Service Type | ATV, street-cruiser-motorcycles, street-motor-scooters, street-touring-motorcycles |
| Size | 12v3Ah |
| Voltage | 12 Volts |
| Battery Cell Composition | Sealed Lead Acid |
| Item Weight | 2.9 Pounds |
| Product Dimensions | 2.76"D x 4.45"W x 3.39"H |
| Terminal | Nut and Bolt |
| Automotive Fit Type | Vehicle Specific Fit |
| Manufacturer | ExpertPower |
Technical specifications
| brand | ExpertPower |
|---|---|
| size | 12v3Ah |
| product_dimensions | 2.76"D x 4.45"W x 3.39"H |
| terminal | Nut and Bolt |
| automotive_fit_type | Vehicle Specific Fit |
| manufacturer | ExpertPower |
| upc | 814832021320 |
| global_trade_identification_number | 00814832021320 |
| model | PowerSport |
| item_weight | 2.87 pounds |
| item_model_number | YTX4L-BS |
| batteries | 1 12V batteries required. (included) |
| is_discontinued_by_manufacturer | No |
| exterior | Polished |
| manufacturer_part_number | BLMMYB12_3 |
| special_features | Rechargeable |
| amperage | 4 Amps |
| best_sellers_rank | #4,916 in Automotive ( See Top 100 in Automotive ) #19 in Powersports Batteries |
| date_first_available | September 22, 2015 |
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Customer reviews
4.21,290 ratings
Customers say
Customers find the battery to be of good quality and easy to install, working right out of the box and fitting perfectly in their vehicles.
★★★★★
Ytx4LBS, so far so good
RumGrum2021—May 13, 2024
I usually use the mightymax (mm) brand with the clear window for the acid but decided to go with these instead due to shipping time no so much for cost as the mm are about $4 more. I bought 2 cause I have 2 taotao ATVs they arrived fully charged about 13.2v but I still stuck them on my solar bank charger for 2 days mainly cause I wasn't ready to work on the ATVs. Got around to fixing up my 125cc and put this then nothing....atv has not ran in over 3yrs. So no plastic fairing anywhere as it all flaked off and I just replaced the PZ20 carbs and fuel line and filter. I have added external accessories like an extra led spot light on the handle bar. The spot light lite up but no cranking. I thought maybe the switch was bad and was getting po. Then it dawns on my, how about the keys to the ignition 🙄. Jeez what reeree! Got the key, turned the ignition on, press the rear brake, and push the start bullion and it started cranking. Was cracking for about 2min as the fuel hadn't reached the new carbs and finally the engine started catching. I thought the battery was gonna give out but nope it stayed powered up until the atv fired up. These small batteries/motorcycle batteries really are a hit or miss as far as longevity goes. The acid leaks out if you keep on trickle charger. It's cheap and it works. Has my thumbs up. Would recommend and buy again. Read more
★★★★★
Perfect fit & great value
William Hazlip—December 17, 2025
This small battery is definitely worth the price. It’s easy to install, and it has a good crank and power fit. The cranking power is impressive for such a small battery pack, and it packs a lot of punch in that little space. Read more
★★★★☆
Great for the price tag
The big Digga cheese man—August 8, 2025
Thing did its job great. Be careful not to do what my ass did though… I had forgotten my bikes lights on after doing ignition coil work. Thing was completely murdered after about a day. I can’t blame the battery for that though haha Read more
★★★★★
Works as it should
joe theriot—January 4, 2026
Exact fit Read more
★☆☆☆☆
Not worthy
Dagne Ziggins—January 3, 2026
You get just what you pay for, cheap battery,didn’t even last one summer. Wouldn’t recommend it. Read more
★★★★★
Thank you
Dedra Gray—November 10, 2025
Great product USA SCOOTERS Read more
★★★☆☆
Batería para moto según descripción
Jefferson—June 1, 2025
No salió como en la descripción. Así que no lo usé Read more
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