18V Battery Systems (Compatible, Interchangeable, Interoperable)

There seems to be a myriad of 18V/20V battery systems out there but no resources to determine their interoperability.

I'm trying to compile a list of systems to help buyers choose tools and batteries.

I've omitted the higher end systems for now because I assume they are a close silo and are designed not to be interoperable.

Corrections, additions and modifications are welcome. Let me know in the comments.

Note: The aim is not to see which system is better - because that deserves its own thread (maybe) :)
but merely to see which tools works with which battery.

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18V/20V Systems

Ozito Power X Change

Xfinity Plus

  • Workzone Xfinity Plus 20V (Aldi) verA
  • PowerG 20V (Autobarn) verA
  • Bayer 18V (Sydney Tools, unconfirmed) verB
  • Baumr 20V (Kogan, unconfirmed) verB
  • Greenlund 18V (Catch, unconfirmed) verB
  • Certa 20V (Kogan, unconfirmed) verC?
  • Matrix X-One 20V (unconfirmed) verC
  • Giantz 20v (Kogan, unconfirmed) verD? (same polarity as verA)
  • Rockwell 18V Shopseries (Supercheap) (unconfirmed)

Note: Same/similar form factor. Some with different polarity

ToolPro

Dewalt

# Note: Same slots. Different notches

Comments

  • +3 votes

    Ozito PXC batteries are self-contained with a BMS; the only 3 terminals connected are ground, TempSense, and +ve. This means it'll charge from any charger that'll provide 21v, and the battery will self-balance.

    This also means that any tools with only two terminals (e.g. All the ALDI Xfinity skins) will run perfectly fine from an Ozito battery, or likewise any Ozito PXC tools will work from any other 5-cell Li-ion battery at 20v. I've done several mods for ALDI tools to accept my Ozito batteries.

    •  

      Thanks! That's useful to know

      • +1 vote

        No problem!

        Also to add, 18v & 20v are identical, both having 5 cells. It's just a marketing difference.

        Ozito PXC are rebrands of the Einhell brand in Europe, so they are also interoperable (although Bunnings is a closer source…)

        Haven't got Ryobi, Makita, Hitachi listed? Or ignoring those due to circuitry complexities and DRM?

        •  

          I've ignored them for now as I don't know about their interoperability. Are they separate, or do the three of them work as one?

          Edit. I've added them as separate systems.

    •  

      Here's a teardown of the Ozito battery. Its contains a LiCoO2 cells, negative temperature coefficient thermistor, microcontroller, and a monitoring & balancing chip. I like them because they are small & relatively cheap.

      https://www.youtube.com/watch?v=pi3EVvdaPuw

  • +1 vote

    These brands range from uncommon to obscure, but they have a standardised battery: https://www.cordless-alliance-system.com/

    •  

      Thanks. Added

  •  

    Thanks OP, this is really helpful as I'm looking to figure out which tool ecosystem to buy into. Just bought a house and it feels like a difficult decision working on a cost benefit analysis vs peer pressure from my friends who use Ryobi. Cheers!

    •  

      nps. I'm trying to figure things out myself. Hence this guide :)

    • +2 votes

      if you intend to share some skins with friends then Ryobi is the way, you guys can share cost of skin between each other for more obscure one that septum get used.

      Else Ozito PXC is the way to go from a value point of view, specially if you stop clearance kits. for example right now they have a 5 tool 2 battery life for $250. That's cheaper than some if the other brands single batteries…

      • +3 votes

        Those Ozito bundles are ridiculously good value… if you can find stock!

        I've had to exchange a few skins (either worn out early, or internal fault) and it's been seamless to go to the desk and get a swap sorted. Cannot say the same for ALDI tools that they don't have in stock!

        One advantage of Ozito PXC over Ryobi is that Bunnings will discount the Ozito's to match ALDI when they have sales, which they won't do on Ryobi's. So patience can pay off very well - I have now got 6x 4Ah batteries that all cost me $39 each. You simply won't get this value AND national availability from any other range.

    • +1 vote

      I don't think there is one system that solves all problems. Ryobi has an awkward, old battery system. But they do have a car charger that Ozito does not have. I've bought Makita brushless 18V vacuums because they are the best solution out of all the manufacturers. The 12V systems from some manufacturers are smaller & better for most woodworking drills.

      Mu default choice is Ozito. They are German designed but built in China.

      If money is no object go Milwaukee.

  • +1 vote

    Ryobi have said they will stick with their system which is ancient & 20+ years old.

    •  

      Adapters are one way to work around the interoperability. You can even 3D print them yourself: https://imgur.com/a/aBdtpDn (@snuffypot11)

      • +2 votes

        You should be careful with adapters as some batteries (eg Milwaulkee, Dewalts, etc..) don't have an integrated battery management system (BMS), which is in the tool instead. So if you use these with a tool where the BMS is normally in the battery (eg Ryobi, Ozito), you take the risk of over-discharging the battery, which will damage the battery and runs the risk of catching on fire.

        •  

          Good to know. Thanks!

        •  

          This is just plain wrong, I recently opened a dewalt 18v lithium battery and they have bms built-in. Very hard to find one without bms nowadays and even if they do exists, the issue is not overdischarge but overcharge, which only happens during charging.

  • +1 vote

    Bosch green?

  • +1 vote

    Great thread. Thanks OP for setting up and thanks everyone for sharing info. I've mostly got corded power tools, so don't have much experience to share, but still really interested. Seems like such a waste of money and resources having to buy multiple different batteries and chargers.

    •  

      So true.. I have ryobi and Hitachi batteries and now thinking of getting ozito or aldi batteries to access some cheaper tools..

  • +1 vote

    Someone on another thread posted that this (https://www.aliexpress.com/item/4001096991306.html) can be used to make Makita batteries compatible with Tool Pro and Worx (and judging by the above, that would mean Rockwell as well).

    I just scored a great deal on a Makita mower that came with two 6AH 18V batteries, and I'll be picking up that adapter so I'm not stuck with Makita tools exclusively.

  •  

    I'm investigating what system the XU1 Blue tools/batteries belong to. From what I can tell, they seem to have Makita-like batteries. Can anyone with XU1 and Makita battery/tools confirm.

    They probably have notches that make them incompatible (like the Dewalt family) but I believe their form factor is the same.

  •  

    Maybe worth adding which batteries has BMS built in?

    Does your list mean that all the xfinity plus batteries and tools are interchangeable without adapter?

    • +1 vote

      I don't know which ones have BMS. Let me know and I'll add. I will also have to convert the list to some form of table as the information starts to become quite dense.

      Xfinity Plus VerA batteries have been confirmed by some here to be compatible.

      There are other versions on that list that may or may not be compatible.

      They were added based on observing the form factor of the batteries, slots and polarity.

  •  

    i have a large set of Dewalt and ryobi one+ skins and batteries.

    a lot of my garden tools are ryobi and i needed more 4Abatteries so i purchased a $26 adapter for my DeWalt batteries to fit the ryobi skins, works a charm and easy to use.
    im going to purchase a second one soon.

  •  

    I'm a little confused. I have a few of the supercheap toolpro devices. Am I safe to be looking at any in first list, or are adaptors needed?

    •  

      Hi @dmbminaret . The first list just lists the systems. Toolpro list is the one you should be looking at. All the batteries in that list are interchangeable without adapters.

      •  

        Oh ok. So these:

        ToolPro 18V
        Worx PowerShare 20V(worx-australia.com)
        Rockwell 18V Lithiumtech(rockwelltools.com.au)
        Rok 18V Green TypeB (Catch, unconfirmed)
        JCB 18V (circa 2018)

        •  

          Correct. I have confirms for all except Rok 18V Green TypeB. I've added that in because the form factor looked the same to me.

  •  

    Has anyone had experience with rockwell stuff?

    I've been happy with toolpro stuff and have a corded worx blower/vacuum but looking at a chainsaw and the toolpro batteries would be good to use:

    https://www.mitre10.com.au/rockwell-18v-chainsaw-25cm-bar-sk...

  • +1 vote

    In case anyone is interested or has the means to refine this with the resistor built in and non-permanent pin sockets

    Xfinity/Ryobi to Milwaukee:
    https://www.thingiverse.com/thing:2848676

  •  

    The DeWalt 14.4V tools sold by Masters a few years ago will work quite happily with the standard 18/20V XR battery with a simple modification to the tool casings. They just run faster… The original batteries are still fine but I just wanted a backup should they fail etc.

    You just need to modify 14.4V tool to suit. It's easy if you compare one to another and my eyes are 57 yrs old. Photo if you want but just look at the side of the battery slide and remove plastic as needed (no need to mod batteries, ONLY the 14.4V tool…)

    Have used for a couple of years ago now and no issues.