Key Takeaways
- Milwaukee M18 6Ah HIGH OUTPUT at 55% off: The M18 REDLITHIUM HIGH OUTPUT XC is the one to grab if you run saws or larger tools.
- Deepest discount this week: The CRAFTSMAN V20 4.0Ah is down 71%, a limited time deal and the biggest markdown in the batch.
- Outdoor power covered: The EGO Power+ 56V 2.5Ah keeps EGO mowers and trimmers running and sits at half off.
- Every pick is a trusted brand: All 10 batteries are first-party packs from Milwaukee, DEWALT, CRAFTSMAN, EGO and WORX, no clones.
It’s the middle of May, which means the mower has come out of the garage, the string trimmer needs a charge, and at least one battery you swore was fine in October is now completely dead. Yard season has a way of exposing every weak link in your cordless setup. This is the week I usually end up buying a spare pack so I’m not standing in the driveway waiting on a charger while half the lawn is done.
What stood out while I was putting this Berry Basket together is how widely batteries are discounted right now. Milwaukee, DEWALT, CRAFTSMAN, EGO and WORX all have packs marked down at the same time, which doesn’t happen every week. The Milwaukee M18 REDLITHIUM HIGH OUTPUT 6Ah caught my eye first because that pack rarely drops far, and the CRAFTSMAN V20 4.0Ah is sitting at a discount deep enough that I had to double-check the original price. Prices verified May 14, 2026.
So this is a battery-heavy week, sorted by platform so you can jump straight to whatever tools you already own. There’s also a Mother’s Day angle here if the person you’re shopping for has a cordless yard setup. A fresh battery is the kind of practical gift that gets used every weekend.
Which Milwaukee M18 battery deals are worth grabbing?
The Milwaukee M18 battery deals worth your money this week are the HIGH OUTPUT 6Ah for demanding tools and the XC 4Ah for everyday use. All three M18 packs below fit any tool in the M18 line, so the choice comes down to runtime versus weight.
Milwaukee M18 REDLITHIUM HIGH OUTPUT 6Ah Battery
Milwaukee 48-11-1865 M18 REDLITHIUM HIGH OUTPUT XC 6 Ah Lithium-Ion Battery
This is the M18 pack I’d buy for myself. The REDLITHIUM HIGH OUTPUT XC 6Ah is built for the tools that drain batteries fast, things like circular saws and high-demand outdoor heads, and it holds up better under load than the standard packs. At 55% off it’s close to what a smaller pack normally costs. If you only own one big M18 tool, this is the battery that makes it usable.
- M18 REDLITHIUM HIGH OUTPUT XC
- 6.0 Ah capacity
- Built for high-demand M18 tools
Milwaukee M18 REDLITHIUM XC 4Ah Battery
The M18 REDLITHIUM XC 4.0Ah is the middle-ground pack, enough runtime for a drill or impact driver to get through real work without the bulk of the 6Ah. It’s the one I’d hand to someone building out their first M18 kit. Not the flashiest deal in the group, but a solid everyday battery at a fair markdown.
- M18 REDLITHIUM XC pack
- 4.0 Ah capacity
- Fits all M18 tools
Milwaukee M18 REDLITHIUM 1.5Ah Battery
Milwaukee M18 1.5 Ah 18V Red Lithium Ion Battery 48.11.1815 for Impact Drill
The M18 REDLITHIUM 1.5Ah is the lightweight option, and weight is the whole point here. It keeps a drill or driver nimble for overhead work and quick jobs where a 6Ah pack feels like a brick. Just go in knowing the runtime is short. This is a backup or a comfort pack, not your main battery.
- Compact M18 pack
- 1.5 Ah capacity
- Lightweight for drills and drivers
What about DEWALT 20V MAX battery deals?
DEWALT 20V MAX batteries are discounted across compact, POWERSTACK and POWERPACK lines this week. Every pack here fits the full 20V MAX tool range, so pick based on how much runtime you need. If you missed last week’s DEWALT battery roundup, this round has fresh picks.
DEWALT 20V MAX XR POWERPACK 4Ah Battery
The 20V MAX XR POWERPACK 4Ah is marketed as having 50% more power than a standard pack, and it’s a strong all-rounder for someone who wants one battery to handle most jobs. It carries a bestseller rank of #34, so plenty of people are already running it. At 53% off it’s an easy add if you’re light on 4Ah packs.
- XR POWERPACK design
- 4.0 Ah capacity
- Compatible with 20V MAX tools
DEWALT 20V MAX POWERSTACK Battery 2-Pack
The POWERSTACK 2-pack is the upgrade option. POWERSTACK cells are more compact and noticeably lighter than DEWALT’s older packs, which you feel after an afternoon of overhead work. Getting two of them at 55% off is the kind of deal that makes the switch worth it. This is what I’d buy if I were replacing a tired old set.
- POWERSTACK lithium ion
- 2-pack
- Compact and lightweight
DEWALT 20V MAX 2.0Ah Compact Battery
The 20V MAX 2.0Ah Compact is the most popular pack in this whole list, sitting at a #5 bestseller rank for a reason. It’s small, light, and fine for drills, drivers and lighter yard tools. At 69% off it’s basically a no-brainer spare. Just don’t expect it to carry a high-drain tool for long.
- Compact 2.0 Ah pack
- Fits 20V MAX tools
- #5 bestseller rank
Best CRAFTSMAN V20 battery deals
The best CRAFTSMAN V20 battery deal this week is the 4.0Ah pack at 71% off, the deepest discount in the entire roundup. Both V20 packs below fit any CRAFTSMAN V20 tool.
CRAFTSMAN V20 4.0Ah Battery
This is the standout discount of the week. The V20 4.0Ah is down 71% as a limited time deal, and it carries a #13 bestseller rank, so it’s a proven pack and not some odd-lot clearance. For anyone in the CRAFTSMAN V20 system, this is the one to grab before the deal expires. I’d buy two at this price.
- V20 lithium ion
- 4.0 Ah capacity
- Fits all CRAFTSMAN V20 tools
CRAFTSMAN V20 2.0Ah Battery
The V20 2.0Ah is the lighter, cheaper companion pack for drills and smaller V20 tools. The discount isn’t as dramatic as the 4.0Ah, but it’s still a fair price for a genuine CRAFTSMAN battery. If you can only justify one purchase, get the 4.0Ah instead. This is the second pack you add later.
- V20 lithium ion
- 2.0 Ah capacity
- Lightweight companion pack
Outdoor power: EGO and WORX battery deals
For battery-powered yard tools, the EGO Power+ 56V and WORX 20V packs below cover the two most common outdoor platforms. Both are at half off.
EGO Power+ 56V 2.5Ah Battery
If you run EGO mowers, blowers or trimmers, the 56V 2.5Ah is the pack that keeps them going, and it’s at a #4 bestseller rank for outdoor power. A spare EGO battery is the difference between finishing the yard and pausing mid-job to charge. At 50% off this is a smart Mother’s Day gift for anyone with an EGO setup. Genuine 56V packs rarely drop this far.
- 56V ARC lithium pack
- 2.5 Ah capacity
- Powers EGO outdoor tools
WORX 20V PowerShare 2.0Ah Battery
The WORX 20V PowerShare 2.0Ah works across the wide WORX PowerShare lineup, which is the appeal of that system in the first place. One battery moves between your trimmer, blower and drill. It’s a modest-capacity pack, so treat it as a runtime extender rather than a heavy-duty workhorse. At half off, it’s a reasonable spare to keep on the charger.
- 20V PowerShare platform
- 2.0 Ah capacity
- Works across WORX tools
Frequently asked questions
Are these genuine batteries or third-party clones?
Every battery in this roundup is a first-party pack from the brand itself, including Milwaukee, DEWALT, CRAFTSMAN, EGO and WORX. None of these are aftermarket or clone batteries. That matters because off-brand packs can void tool warranties and don’t always communicate properly with the tool’s electronics.
Will a Milwaukee M18 battery work with my older M18 tools?
Yes. All M18 batteries are designed to fit and power any tool in the Milwaukee M18 line, old or new. The HIGH OUTPUT packs simply deliver more under heavy load, but they still drop into the same tools as a basic M18 battery.
Is a higher amp-hour battery always the better choice?
Not always. A higher Ah pack like a 6Ah runs longer and handles high-drain tools better, but it’s also heavier and more expensive. For drills, drivers and quick jobs, a 1.5Ah or 2.0Ah pack is lighter and easier to handle all day.
Can I use one brand’s battery in another brand’s tool?
No. Each brand’s batteries only fit that brand’s platform, so a DEWALT pack won’t work in a Milwaukee tool and vice versa. Always match the battery to the tool system you already own.
Which deal has the biggest discount this week?
The CRAFTSMAN V20 4.0Ah at 71% off is the deepest markdown in this roundup, and it’s a limited time deal. The Milwaukee M18 HIGH OUTPUT 6Ah and the DEWALT 2.0Ah Compact are close behind on percentage off.
Discounts this week ran from about 47% off on the lighter packs up to 71% off on the CRAFTSMAN V20 4.0Ah, which is a wider spread than I usually see in a single category. The original prices looked honest too, no sign of the inflated-then-slashed nonsense that shows up on cheaper battery listings. When five major tool brands all discount packs in the same week, it’s worth paying attention. You can browse all deals if you want to compare against the rest of the garden lineup.
Honest take: this was a strong week for batteries. The two I’d put my own money on are the Milwaukee M18 HIGH OUTPUT 6Ah, because that pack rarely drops this far and it actually changes what your bigger tools can do, and the CRAFTSMAN V20 4.0Ah for the sheer size of the discount. The one I’d skip unless you specifically need it is the Milwaukee M18 1.5Ah. It’s a fine comfort pack, but most people are better served by the 4Ah for the same platform.
Looking ahead, battery deals tend to get even deeper heading into June as Father’s Day promotions kick in, so if you’re not in a hurry, a standard 2Ah or 4Ah pack might dip a little more. The outdoor packs are the exception. EGO and other yard-tool brands usually tighten up as mowing season peaks, so if your mower battery is fading, I wouldn’t wait on the EGO 56V deal. That’s the one with a real clock on it.
