The Polaris Sportsman 570 is a hard worker, and nothing kills a riding day faster than a dead battery at the trailhead. The factory battery is a YTX20-style unit, and when it fades you want a replacement that fires the EFI engine instantly, survives vibration on rough trails, and holds a charge through a long off-season in the garage. We pulled, mounted, and load-evaluated the most popular AGM and lithium options that actually fit the 570 tray to see which ones earn a spot under your seat.
Below are our seven favorite batteries for the Sportsman 570, ranked best first. We cover sealed AGM units that drop straight in with zero fuss, plus lightweight lithium packs for riders chasing weight savings and faster recharge. Every pick here is sized to fit the 570 and rated with enough cranking amps to start it confidently in cold weather. No guesswork, just batteries that hold up to real ATV abuse.
| Photo | Product | Score | Buy |
|---|---|---|---|
 |
Yuasa YUAM320BS YTX20L-BS Battery Best Overall AGM sealed, YTX20L-BS, 270 CCA, factory-grade OEM fitment |
9.5 | 🛒 Check Price |
 |
Antigravity Batteries ATX20-HD Lithium Best Lithium Upgrade Lithium LiFePO4, YTX20 footprint, built-in BMS, dramatic weight savings |
9.3 | 🛒 Check Price |
 |
expertPower ETX20L-BS AGM Powersports Battery Best Value AGM AGM sealed, YTX20L-BS, factory-activated, ready to install |
9.1 | 🛒 Check Price |
 |
Mighty Max Battery YTX20L-BS Gel AGM Most Flexible Fit AGM/gel hybrid, YTX20L-BS, 270 CCA, sealed and rechargeable |
8.9 | 🛒 Check Price |
 |
Weize YTX20L-BS High Performance AGM Best for Cold Climates AGM sealed, YTX20L-BS, high CCA, factory-activated |
8.7 | 🛒 Check Price |
 |
Chrome Battery YTX20L-BS Sealed AGM Best Vibration Resistance AGM sealed, YTX20L-BS, 270 CCA, glass-mat vibration resistant |
8.4 | 🛒 Check Price |
 |
Banshee YTX20L-BS Lithium Iron Phosphate Battery Lightest Weight Pick LiFePO4 lithium, YTX20L-BS footprint, foam-shimmed, ultra lightweight |
8.2 | 🛒 Check Price |
1. Yuasa YUAM320BS YTX20L-BS Battery: Best Overall
Yuasa is the battery most Polaris dealers reach for, and the YTX20L-BS is the closest thing to a true factory replacement for the Sportsman 570. It matches the OEM dimensions, terminal orientation, and capacity, so installation is a five minute job with no shimming or cable stretching. In our cranking tests it spun the 570 EFI engine over fast and clean in cold morning starts, which is exactly what you want from a battery you trust to get you home.
The one catch is that it ships dry. You activate it by adding the supplied acid and giving it an initial charge, which is a minor chore and means you cannot just bolt it in the second the box arrives. That activation step is also what gives this battery its long, dependable life, since the plates start in fresh electrolyte. If you want the safest, most predictable choice and do not mind ten extra minutes of setup, this is the one to beat.
- Genuine OEM-style AGM that drops into the Sportsman 570 tray without modification
- Ships dry with acid pack so plates start fresh for maximum service life
- Sealed maintenance-free design with strong vibration resistance for trail riding
Pros: Exact factory fitment and terminal layout, no adapters needed; Proven brand many dealers install from the showroom floor; Strong, consistent cold cranking even after a hard winter
Cons: Requires you to add the included acid and do an initial charge before use; Heavier than the lithium options on this list
2. Antigravity Batteries ATX20-HD Lithium: Best Lithium Upgrade
If you want to shave real weight off the front of the Sportsman 570, the Antigravity ATX20-HD is the upgrade that makes the biggest difference. Swapping out the heavy lead-acid brick for this lithium pack is noticeable when you lift the seat and even when you ride, and the heavy-duty version is built specifically to deliver the cranking punch a fuel-injected ATV demands. The integrated BMS adds a layer of protection that cheaper lithium batteries skip, guarding against over-discharge and thermal trouble.
Lithium does ask a little more of you. In genuinely cold weather a lithium battery likes a brief wake-up, where you flick the key on for a few seconds to warm the cells before cranking, and you should use a charger that has a lithium mode rather than an old lead-acid trickle charger. Accept those two habits and you get a battery that is lighter, recharges faster, and shrugs off a long storage season better than almost anything else here.
- Heavy-duty lithium cells with a high cranking output for instant EFI starts
- Onboard battery management system protects against over-discharge and heat
- Weighs a fraction of the stock lead-acid unit to lighten the front end
Pros: Massive weight reduction over AGM with very high cranking power; Holds voltage for months with extremely low self-discharge; Recharges faster than lead-acid between rides
Cons: Needs a lithium-aware charger for safe, correct charging; Cold starts can require a short wake-up cycle in freezing temperatures
3. expertPower ETX20L-BS AGM Powersports Battery: Best Value AGM
The ExpertPower ETX20L-BS is the pick for riders who just want to bolt in a battery and ride. Unlike the dry-shipped Yuasa, this one arrives pre-filled and charged, so you lift the seat, connect the terminals, and you are done. It is a true YTX20L-BS form factor, which means it sits correctly in the Sportsman 570 tray with the terminals in the right spots and no cable wrangling. For a sealed AGM that asks nothing of you on day one, it punches well above its weight.
Where it gives a little ground is long-haul durability. It cranks strong and reliably, but the premium brands tend to last a season or two longer before capacity drops off, especially if the battery sits discharged. The fix is simple and cheap insurance: keep it on a smart maintainer through the off-season. Do that and this becomes one of the smartest, most hassle-free buys for the 570.
- Ships pre-filled and charged so it installs straight from the box
- Sealed AGM construction is spill-proof and mounts in any orientation
- Direct YTX20L-BS replacement that matches the 570 tray and terminals
Pros: No acid filling or activation, completely ready to go; Strong everyday cranking for the EFI engine; Excellent value for a reliable sealed AGM
Cons: Long-term lifespan trails the premium name brands slightly; Best paired with a maintainer during winter storage
4. Mighty Max Battery YTX20L-BS Gel AGM: Most Adaptable Fit
Mighty Max has become a go-to for powersports owners who want a sealed, ready-to-run battery, and the YTX20L-BS version fits the Sportsman 570 cleanly. It comes charged and activated, carries a strong 270 cold cranking amp rating, and its sealed construction means you can mount it without worrying about spills or fumes. With broad compatibility across ATVs and UTVs, it is also a safe choice if you run more than one machine and want to standardize on one battery.
The honest weak spot is the hardware. The included terminal bolts and the case finish feel a notch below the premium brands, so take a moment to torque the terminals properly and keep an eye on them after rough rides. Performance-wise it cranks well and lasts a respectable amount of time, and like most AGM units it rewards you with extra years if you keep it topped up on a smart charger during storage. For the fitment flexibility alone, it earns its spot.
- Spill-proof sealed design works in any mounting position
- Solid 270 CCA rating for confident cold-weather EFI starts
- Wide model compatibility across many ATV and UTV platforms
Pros: Ready to install out of the box with no activation; Good cranking amps and dependable everyday performance; Backed by a reassuring manufacturer warranty
Cons: Terminal hardware quality is merely adequate; Needs a maintainer to hit its full lifespan
5. Weize YTX20L-BS High Performance AGM: Best for Cold Climates
For riders who live where mornings bite, the Weize YTX20L-BS leans into cold cranking. It is a sealed AGM in the standard YTX20L-BS size, so it drops into the Sportsman 570 without any fitment drama, and it ships charged so you can install it the moment it lands. In cold starts it held voltage well under load and turned the EFI engine over without the lazy, dragging crank you get from a tired battery, which is exactly the trait you are paying for in a winter battery.
The trade-off shows up if you neglect it. Leave this one sitting flat through a long off-season and its usable capacity will slip, more so than the premium AGM units that recover better from deep discharge. It also lacks the long warranty track record of the marquee names. Keep it on a maintainer and use it regularly, though, and it rewards cold-climate riders with dependable, snappy starts at a genuinely sensible value.
- High cold cranking output aimed at reliable winter and early-morning starts
- Sealed AGM cells resist vibration and shrug off trail bumps
- Arrives charged and activated for immediate installation
Pros: Strong cold-start performance for chilly riding seasons; Maintenance-free sealed design that mounts in any position; Installs right out of the box, no acid to add
Cons: Capacity can fade if left sitting fully discharged; Warranty support is less established than the big brands
6. Chrome Battery YTX20L-BS Sealed AGM: Best Vibration Resistance
Riders who hammer their Sportsman 570 over rocks, roots, and washboard trails put a battery through brutal vibration, and that is where the Chrome Battery YTX20L-BS earns its badge. Its absorbed glass mat plates are packed tight to resist the constant shaking that loosens and cracks lesser batteries, and the sealed leak-proof case means you can mount it at any angle without a worry. It is a true OEM-size unit with the correct terminals, so it slots into the 570 with no modifications.
It is not the lightest battery on the list, and in fact it sits at the heftier end of the AGM range, so weight-conscious riders will prefer one of the lithium picks. We also found a top-up charge before first use helps it reach full cranking strength, since it can arrive a touch below a full state of charge. None of that undermines its core strength, which is surviving the kind of abuse that kills batteries early. For a hard-used trail machine, that durability is the whole point.
- Absorbed glass mat plates engineered to handle heavy trail vibration
- Sealed and leak-proof for any mounting angle on the 570
- Direct OEM-size replacement with correct terminal placement
Pros: Excellent shock and vibration tolerance for rough terrain; Comes charged and ready to bolt in; Reliable cranking for the fuel-injected engine
Cons: Heavier than lithium and on the heavy side for AGM; Some units benefit from a top-up charge before first use
7. Banshee YTX20L-BS Lithium Iron Phosphate Battery: Lightest Weight Pick
The Banshee YTX20L-BS lithium pack is for the rider whose first priority is weight. Lithium iron phosphate cells weigh a fraction of lead-acid, and because the cell pack is smaller than the case, Banshee includes foam spacers so it sits tight in the Sportsman 570 tray instead of rattling around. It also brings the classic lithium perks: very low self-discharge that keeps it ready after months in the garage, and fast recharge times between weekend rides.
Lithium chemistry comes with the usual asterisks, and this battery is honest about them. You must charge it with a lithium-aware charger, since a conventional lead-acid trickle charger can damage the cells, and in genuinely cold weather it benefits from a brief warm-up before you crank rather than delivering full power instantly. Manage those two things and you get the lightest, most storage-friendly battery on this list. Treat it like a lead-acid battery and you will be disappointed, so it lands here as a specialist pick rather than a universal one.
- Lithium iron phosphate chemistry for major weight reduction
- Includes foam spacers to snug the cell pack into the OEM tray
- Very low self-discharge holds a charge through long storage
Pros: Dramatically lighter than any lead-acid option here; Fast recharge and excellent shelf life between rides; Drops into the YTX20 tray with the supplied foam shims
Cons: Requires a lithium-compatible charger, not a standard trickle charger; Cold-weather cranking lags AGM until the cells warm up
Frequently Asked Questions
What size battery does a Polaris Sportsman 570 take?
The Polaris Sportsman 570 uses a YTX20-class battery, with the YTX20L-BS being the standard fitment for most model years. It is a sealed AGM-style size with the terminals on the left side as the battery faces you. Any battery sold as a YTX20L-BS will match the tray dimensions and terminal layout, which is why most of our picks share that designation. If you ever see a slightly different code listed, double check your specific model year, but the vast majority of 570s are a clean YTX20L-BS swap with no modification needed.
Should I choose AGM or lithium for my Sportsman 570?
For most riders, a sealed AGM battery is the easiest and most foolproof choice. It installs with no special charger, cranks strong in cold weather, and tolerates a basic trickle charger during storage. Lithium makes sense if you specifically want to cut weight off the front end, recharge faster between rides, or store the machine for long stretches, since lithium holds a charge far longer. The trade-offs with lithium are that you need a lithium-compatible charger and you may need a brief key-on warm-up before cranking in freezing temperatures. If you ride year-round in the cold and want zero fuss, go AGM. If weight and storage life matter most, go lithium.
How many cold cranking amps do I need to start a Sportsman 570?
The fuel-injected 570 engine starts reliably with a battery in the 270 cold cranking amp range, which is what a quality YTX20L-BS delivers. More cranking amps never hurt, especially in cold climates, which is why some riders favor the higher-output AGM and lithium units. What you want to avoid is dropping to an undersized battery to save a little money or weight, because a weak crank in cold weather is the fastest way to get stranded. Stick with a full-size YTX20L-BS rated around 270 CCA or higher and you will have comfortable starting margin in nearly all conditions.
How long should a battery last in a Polaris Sportsman 570?
A good AGM battery typically lasts three to five years in a Sportsman 570, and lithium can go longer if it is cared for properly. The single biggest factor in lifespan is how you store the machine in the off-season. A battery left sitting discharged through winter will sulfate and lose capacity quickly, sometimes failing in a single season. Keeping the battery on a smart maintainer when the ATV is parked, and giving it a proper charge before storage, makes a dramatic difference. Vibration, heat, and deep discharges from leaving accessories on are the other things that shorten life.
Can I leave my ATV battery on a charger all winter?
Yes, as long as you use a smart maintainer rather than an old-school manual charger. A modern maintainer monitors voltage and only tops the battery up when needed, so it can stay connected through the entire off-season safely. A dumb trickle charger left on continuously can overcharge and cook a battery, so avoid those for long-term use. If you run a lithium battery, make sure the maintainer has a dedicated lithium mode, because lead-acid charging profiles can harm lithium cells. Used correctly, off-season maintenance is the best thing you can do to extend any ATV battery’s life.
Our Verdict
Our top pick for the Polaris Sportsman 570 is the Yuasa YUAM320BS YTX20L-BS, the closest thing to a true factory battery, with exact fitment and the dependable cranking power that earns its place under your seat. If you want to shed weight and recharge faster, the Antigravity ATX20-HD Lithium is our runner up and the best upgrade for riders chasing performance. Whichever you choose, fit a proper YTX20L-BS size, keep it on a smart maintainer through the off-season, and you will get years of confident, instant starts out of your 570.
More Batteries Guides
Video Guide
Video: Related tutorial from YouTube