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Re:Milwaukee M18 Battery Reverse Engineering by tomcam on Thursday April 17, 2025 @04:46PM (#43722054)
FWIW I find these batteries and the charger to be exceptional. You can just leave batteries in and it knows when to stop charging. If you get the big charger and put a bunch of batteries in it charges them round-robin style. And the batteries themselves seem to be sturdy, robust, and high capacity. They're also expensive af so you want to wait for a sale if possible. I even spent a ridiculous amount of money on the battery-powered wet/dry vac and haven't regretted it for a moment.
Re:Milwaukee M18 Battery Reverse Engineering by mapt on Thursday April 17, 2025 @07:18PM (#43723261)
> You can just leave batteries in and it knows when to stop charging.

This is true of all modern lithium ion consumer hardware, because if you don't get this part right, the battery explodes and burns down your house the first time.

Re:Milwaukee M18 Battery Reverse Engineering by sidewndr46 on Thursday April 17, 2025 @10:45PM (#43724463)
One of my co workers decided to charge his drone at the office and found this out . Or more accurately the whole office did
Re:Milwaukee M18 Battery Reverse Engineering by philjohn on Friday April 18, 2025 @03:52AM (#43725956)
Is there now a section of the employee policies that forbids charging drones in the office?
Re:Milwaukee M18 Battery Reverse Engineering by lazide on Friday April 18, 2025 @04:00AM (#43725993)
The manuals have always told people to charge outside, for this reason.
Re:Milwaukee M18 Battery Reverse Engineering by xnzakg on Friday April 18, 2025 @06:04AM (#43726558)
Not when the charger says "for home and office use only"
Re:Milwaukee M18 Battery Reverse Engineering by sidewndr46 on Friday April 18, 2025 @11:33AM (#43729039)
There's probably some weird clause in the usage guidelines saying you need to have the charger attended all times it is plugged in or something like that.
Re:Milwaukee M18 Battery Reverse Engineering by mapt on Sunday April 20, 2025 @10:36PM (#43748072)
It's not just a clause. People will claim that this is the only safe way to charge them.

Personally, I think we need a cultural-architectural accommodation - we used to have coal chutes, milkman boxes, ice doors. For well-regulated but large batteries like an EV, a detached garage. For raw cells, a grill sitting on the driveway.

I have only had one "Spicy Pillow" from consumer devices (a phone-charger power bank), but with raw LIPOs in RC hobby gear it was an eventuality.

Re:Milwaukee M18 Battery Reverse Engineering by simooooo on Friday April 18, 2025 @07:18AM (#43726959)
The DJI batteries and charger are very clever too. The batteries auto discharge to a safe level after 2 weeks on the shelf
Re:Milwaukee M18 Battery Reverse Engineering by linsomniac on Thursday April 17, 2025 @06:15PM (#43722808)
I just switched over the last 6 months over to Milwaukee tools for my home DIY stuff and they are really exceptional. I got one of the 7 1/4" circular saws with a FORGE battery and it just cuts everything I've thrown at it effortlessly. I'd put it as more powerful than my Dewalt 10" corded tablesaw, at least it seems much happier to rip a 2x4 than the table saw. I even designed a 3D printed sled for it to run on my track saw tracks and it does a great job there.
Re:Milwaukee M18 Battery Reverse Engineering by TylerE on Thursday April 17, 2025 @07:59PM (#43723555)
Some of the battery powered tools really are more powerful these days, since a home 110v circuit is limited to a total draw of 1800w or so. The latest gen 18v/24v batteries can actually deliver more than that, at least for short bursts. Especially the big 4AH+ packs.
Re:Milwaukee M18 Battery Reverse Engineering by skunkworker on Friday April 18, 2025 @05:46AM (#43726470)
I recently purchased a M18 trimmer after not using one for years, it still surprises me that when not on the throttle - "off" is truly off, and not the persistent hum of a 2 stroke that is too loud in your left ear. No fumes and no fuel/oil mix to worry about.
Re:Milwaukee M18 Battery Reverse Engineering by linsomniac on Friday April 18, 2025 @09:40AM (#43727999)
I've tried to minimize the number of battery families I have, but I did buy into the Ego set of tools ~10 years ago for the yard tools, starting with the mower but I've since added the trimmer and chainsaw. Not having to do small motor repair and maintenance has been so nice!

I was a little annoyed that some of the Milwaukee tools require you to go with the M12 battery (the "bandfile" is what sucked me in) so now I've got 2 battery ecosystems for the tools, but I guess that's not the end of the world.

Re:Milwaukee M18 Battery Reverse Engineering by Moto7451 on Friday April 18, 2025 @10:19AM (#43728333)
Even TTI’s lesser Ryobi stuff (my usual go to as a DIYer who bought two tools 15 years ago and the batteries are still compatible) has benefited immensely from tabless and 21700 cells. My 21700 8aH batteries is usually the difference between “can’t cut” and “huh is slowed a little <shrug>”
Re:Milwaukee M18 Battery Reverse Engineering by linsomniac on Friday April 18, 2025 @12:26PM (#43729564)
I think the Ryobi are a good choice. ~12 years ago I got Porter Cable tools, and they worked very well for me over that time. But there was a pretty limited set of tools available, it did cover the core ones though. I had previously had DeWalt tools and felt I didn't use them up to their potential, so I went "down" to the Porter Cable.

I almost went with Ryobi when I did my recent refresh. But I've changed to doing way, way more with the tools, I'm basically using them every weekend now. And the Milwaukees are just a joy to use, though you do pay for that. One benefit I didn't realize when I bought the hammer drill: It will detect if it grabs and the tool starts spinning. I was using a mini auger to break up some soil and the Porter Cable I nearly broke my wrist when it grabbed. I got the Milwaukee partly because it had a second handle you could add, but the accelerometer worked even better than that.

Re:Milwaukee M18 Battery Reverse Engineering by bombcar on Thursday April 17, 2025 @04:47PM (#43722067)
I never buy the batteries - I always look for a tool with the battery, as you can almost always score a free tool (or free battery depending on how you look at it).
Re:Milwaukee M18 Battery Reverse Engineering by FlyingBears on Thursday April 17, 2025 @10:08PM (#43724245)
Drug dealers give out feelers to get customers started.
Re:Milwaukee M18 Battery Reverse Engineering by wlesieutre on Thursday April 17, 2025 @10:10PM (#43724252)
The 4x 18V/5Ah batteries that came with my lawnmower (which uses them in pairs) are retailing for for $560.

And then not as any sort of special deal, just the standard retail bundle, the lawnmower with four batteries included costs $700. So that's $560 of batteries and $140 of lawnmower.

It's funny how lithium ion cell prices have absolutely cratered everywhere else, but the price of tool batteries just keeps going up.

I wish there was somebody making reputable quality compatible tool batteries instead of mystery brand counterfeit trash.

Re:Milwaukee M18 Battery Reverse Engineering by terribleperson on Friday April 18, 2025 @02:17AM (#43725511)
At this point I suspect the only way we're getting compatible tool batteries is if the E.U. comes out with regulation.

No company actually wants to make it easier for people to buy other tool brands.

Re:Milwaukee M18 Battery Reverse Engineering by simondotau on Friday April 18, 2025 @04:36AM (#43726162)
Before the EU can do that, someone will have to define a standard.
Re:Milwaukee M18 Battery Reverse Engineering by Already__Taken on Friday April 18, 2025 @06:36AM (#43726717)
That is how the EU will do that.
Re:Milwaukee M18 Battery Reverse Engineering by simondotau on Thursday April 24, 2025 @05:20AM (#43780708)
That's not how literally anything works, or has ever worked.
Re:Milwaukee M18 Battery Reverse Engineering by throwaway81523 on Friday April 18, 2025 @05:54AM (#43726506)
ceenr.com batteries appear to be ok.
Re:Milwaukee M18 Battery Reverse Engineering by blagie on Friday April 18, 2025 @09:00AM (#43727681)
Curiously, the mystery brand Bosch-compatible batteries on I bought on eBay -- literally cheapest seller -- seem to work very well even after years.

With brandless batteries, it's luck-of-the-draw, but overall, as much as I do wish there were some way to know what you're getting, I've had good luck more often than not.

What's also been nice is the rise of adapters. My Bosch blue batteries now fit many places they didn't used to.

Re:Milwaukee M18 Battery Reverse Engineering by freedomben on Friday April 18, 2025 @02:48PM (#43730827)
I wish these manufacturers wouldn't go brandless, because I've found some cheap but great laptop chargers in the past that I would buy a ton of if I knew who made them, but the brandless nature means that once that seller is done or out of stock, it's back to crapshoot.

Some of these brandless Chinese makes are really solid, high quality products, but you can't easily tell which ones because they're visually indistinguishable from the bad ones.

Re:Milwaukee M18 Battery Reverse Engineering by bsoles on Friday April 18, 2025 @09:12AM (#43727769)
> It's funny how lithium ion cell prices have absolutely cratered everywhere else, but the price of tool batteries just keeps going up.

Seems like the tool batteries might be the new ink cartridges.

Re:Milwaukee M18 Battery Reverse Engineering by eth0up on Friday April 18, 2025 @09:52AM (#43728108)
Re:Milwaukee M18 Battery Reverse Engineering by Panzer04 on Friday April 18, 2025 @10:21AM (#43728347)
You get what you pay for.

Tool batteries as a general rule don't do anything fancy internally, so they are easily substituted. I suspect it's mostly a matter of the main buyers being tradies/workers who use them to make money and thus don't care that much about the expense of the batteries - they probably aren't replaced that often.

Would be nice if there was a 3rd-party seller known to use quality cells though, rather than unknown off brands.

Re:Milwaukee M18 Battery Reverse Engineering by lq9AJ8yrfs on Friday April 18, 2025 @11:31AM (#43729009)
Seems like this is the kind of thing that could be the basis of a community?

It feels like there is a segment the tool co's are selling toward, that leaves another segment underserved.

Eip if this is something you want to hobby-horse on.

Re:Milwaukee M18 Battery Reverse Engineering by cameron_b on Thursday April 17, 2025 @05:42PM (#43722549)
I have three M18 batteries that are from 2011, and have outlasted 4 Ryobi batteries that get much less abuse.
Re:Milwaukee M18 Battery Reverse Engineering by Glawen on Friday April 18, 2025 @04:31AM (#43726131)
Same with my blue Bosch batteries from 2010. They use quality cells
Re:Milwaukee M18 Battery Reverse Engineering by simondotau on Friday April 18, 2025 @04:42AM (#43726193)
Define abuse — because what Lithium Ion hates more than anything is long periods stored at over 80 percent, and especially heat stress while fully charged.

Batteries which are used regularly and spend more time between 20–80 percent full might be less "abused" than batteries which are used infrequently, and stored in a room which sometimes gets hot.

Re:Milwaukee M18 Battery Reverse Engineering by therealpygon on Friday April 18, 2025 @09:35AM (#43727950)
I’d say the thing any lithium seems hate worse, for me, are long periods at 0%.

As a homeowner I’ve had Ryobi lithium batteries for over a decade. Other than having added a couple battery packs from deals and a couple batteries from tools, I’ve not had a single one of my batteries fail. All are being stored at the maximum charge. Some don’t last quite as long these days, to be expected with age, but not one has actually failed even from being dropped off ladders onto concrete. I did, however, have a Dewalt at work that died from falling 4 feet to the carpet floor. I’ve only had one Ryobi tool fail in that time, and those circumstances were questionable since someone had borrowed it.

Experiences are localized and subjective.

Re:Milwaukee M18 Battery Reverse Engineering by Panzer04 on Friday April 18, 2025 @10:24AM (#43728370)
True 0V is very bad for lithium batteries, but extended periods at low SoC should be Ok (2.5V+). If there's any drain on the battery though low SoC can easily become 0V and dead battery (most chargers should refuse to charge those)
Re:Milwaukee M18 Battery Reverse Engineering by JasonSage on Thursday April 17, 2025 @07:17PM (#43723253)
Where do you usually look for a sale on Milwaukee? I got lucky finding a great bundle sale at a Home Depot once, I'd love any tips on where/when to look more specifically.
Re:Milwaukee M18 Battery Reverse Engineering by spaceguillotine on Thursday April 17, 2025 @07:26PM (#43723329)
Acme Tools, sometimes Grainger will have a sale too
Re:Milwaukee M18 Battery Reverse Engineering by reaperman on Thursday April 17, 2025 @08:36PM (#43723749)
Re:Milwaukee M18 Battery Reverse Engineering by tomcam on Thursday April 17, 2025 @10:46PM (#43724473)
Home Depot website
Re:Milwaukee M18 Battery Reverse Engineering by phil21 on Thursday April 17, 2025 @11:13PM (#43724646)
Home Depot is usually pretty good. Bundles are available fairly commonly as starter packs if you need to start from nothing. The drill/impact kit is likely where I'd begin since both of those (gen3) are exceptional in my opinion.

Where it gets fun are the "buy a battery pack and get a tool free" deals. I had a bunch of text typing this out, but the stickied Reddit post covers it better[1]. You can typically get the tool you want for 40-60% off when/if it goes on sale using the "Home Depot Hack". Most common tools do at least once a year - the esoteric items are more hit or miss.

I rarely pick up a tool now at full price. Once I know I want one, I simply add it to a list and note when it goes on sale in one of those combo deals. I've also picked up way more batteries than I ever will need due to other sales as well.

The Milwaukee "buy more save more" event also works well if you need what is going on sale at the time.

Reddit /r/milwaukeetool is a good place to check in from time to time for sales. Slickdeals is great for setting up an alert, but the exceptional deals get sold out quickly once it hits that site. There are also Discord groups out there as well if you go deep down the rabbit hole.

Warning: Once you learn about Packout this becomes somewhat of an addiction for certain personalities.

[0] https://old.reddit.com/r/MilwaukeeTool/comments/1gwhvi9/the_...

Re:Milwaukee M18 Battery Reverse Engineering by thephyber on Friday April 18, 2025 @12:23AM (#43724996)
HomeDepot is one of the few warranty retailers. The “Special Buy of the Day” is updated a few minutes after midnight and usually has power tools about 10% of the days or the year. Right now HD is running their “Black Friday of Spring”. Some of the best deals for hand tools are in-store clearance, so you just have to be in the store and find it (SlickDeals will try to announce those, but inventory for those are store-specific).

Sadly one of the best ways to get cheap Milwaukee M18 tools is the “hackable” sales from Home Depot: when 2 SKUs bought together makes them both cheaper, but if you buy them online and have the 2 SKUs sent to different HomeDepo stores, you can cancel one of the SKUs later and the non-cancelled one is deeply discounted. It’s probably a violation of ToS, but customer service reps allow it and support it, so maybe it’s not actually a violation… ? It feels like corporate may eventually ban users who abuse that and cost more money than they are worth.

Milwaukee doesn’t sell via Amazon or eBay and there are notoriously good Chinese clones on those sites.

I did get 3 decent Milwaukee (mostly M18) deals on Woot.com, but you have to jump on those quickly.

There is a great website that does good price history + price comparison between HomeDepo, Lowe’s, and WalMart but I can’t find the link. If anyone has it, please share.

Re:Milwaukee M18 Battery Reverse Engineering by phil21 on Friday April 18, 2025 @11:37AM (#43729084)
> It’s probably a violation of ToS, but customer service reps allow it and support it, so maybe it’s not actually a violation… ? It feels like corporate may eventually ban users who abuse that and cost more money than they are worth.

I've done this at least a few dozen times over the past 4-5 years now. I have way more tools than is reasonable for my use-case. No problem so far.

From what I can tell HD doesn't seem to care much - the margin on these things has to be insane, so they are likely still making money on the transaction. Given how the discount is pro-rated across both SKUs you apply the deal to they likely did that on purpose. Who knows what rebates they are getting on the backend from Milwaukee on such promos, but I'd be surprised if there were none.

I imagine if you did this a dozen times in a given month they might ban you for outright suspected return fraud - but for most folks I don't think it's a major concern.

Re:Milwaukee M18 Battery Reverse Engineering by nicwolff on Friday April 18, 2025 @04:26PM (#43731576)
https://toolguyd.com is good for tool sale notifications.
Re:Milwaukee M18 Battery Reverse Engineering by Casteil on Friday April 18, 2025 @09:26AM (#43727865)
They're not the only battery tools I have (also have some Makita), but I am a big fan of virtually all my M12/M18 stuff. From the track saw, to the portable bandsaws, to the band files, oscillating multitools, reciprocating saws, jigsaws, drills, drivers, blowers, string trimmers, etc... their lineup is just incredibly diverse, servicing many trades/tasks, and they hardly ever make a 'dud'.

Their batteries, at least in my experience, have also been similarly long-lived and reliable over years. And yeah - like some others have said - I also get all my batteries from 'battery included' tools/deals. I don't think I've ever bought one by itself.

Re:Milwaukee M18 Battery Reverse Engineering by freedomben on Friday April 18, 2025 @02:44PM (#43730786)
Indeed, I've been really pleased. They continue to hold a solid charge for years as well, even when left in harsh environments (like fluctuations between extreme hot and cold, etc). When I first started using battery power tools they were terrible. They had almost no power and batteries would die rapidly, usually at the worst possible time (like when you're using arms, shoulders, and knees to hold a piece in place and you just need to get a couple of screws in to hold it in position and the damn thing dies). A few years ago my wife got me a Milwaukee power driver/drill set and it almost instantly became my favorite tool. I haven't switched to the saws yet because I have great saws that stay in my shop, but I'm impressed enough that if I need to go to a work site again I'll consider it very seriously, whereas in the past I never would have.
Re:Milwaukee M18 Battery Reverse Engineering by archduck on Thursday April 24, 2025 @01:18PM (#43785142)
Hell yeah. I bought the Milwaukee shop vac a few weeks ago. Didn't realize it comes without batteries... which come without a charger. But I couldn't be happier with it. We have a cat that will create mounds - tall mounds - of cat litter in front of the litterbox entrance. Just hurls it out the hole somehow into a big pile. I just empty out the big tray at the bottom of the shop vac, suck up the litter in a few seconds, and dump it right back into the box. It's quick, clean, and easier than trying to change a cat's behavior. And for cat barves, like when they eat too fast, I just take the filter out and vacuum that up no problem, and it's powerful enough that you can't even tell that anything happened on the rug. (It's always on a rug, never on the hardwood floor. Naturally.) It's a game changer for this cat owner.