BAUKER 18V Cordless 115mm Angle Grinder, 1 x 4.0Ah Battery, Battery Charger (2 Year warranty) £59.99 Delivered @ Worx/eBay store

Could this cut through 50mm concrete flagstones / slabs?

Good money saving for the nasty little bike thieves out there.

Bellboys has posted several excellent Bauker cordless tool deals on here and inevitable they attract comments about compatibility with WORX and other brands from the same maker. Some posters claim Bauker and WORX are fully compatible - unfortunately they are NOT!

Here's the definitive answer (I have both brands and just tried them again:

WORX batteries will NOT physically fit on a Bauker charger*.
WORX batteries will NOT physically fit on a Bauker tool*.
Bauker batteries WILL fit on a WORX charger.
Bauker batteries WILL fit on a WORX tool (and seem to work it OK).

*IF you are prepared to modify your WORX batteries (remove one of the 'lugs' on the plastic casing) you could probably make them physically fit on the Bauker charger and tools BUT:

The WORX batteries have four connectors, marked '+', 'BS', 'TV', ''-'.
The Bauker batteries have the same markings but the 'TV' slot has no connector.
WORX tools and charger have pins for all four connectors on the batteries.
Bauker tools connect to the '+' and '-' slots on the battery.
The Bauker charger connects to the '-' and 'BS' slots on the battery

I don't know what the 'BS' and'TV' pins are for (and Positecworx were being very coy when asked) but possibly they are part of a more sophisticated battery sensing system on WORX? I'd be very interested to know if there are any electrical experts out there who can shed light on this.

So, in summary, the Bauker batteries will physically fit the WORX charger and tools but WORX batteries (and charger) are not 'backwards compatible' onto Bauker tools. If you are prepared to make a fairly small modification to your WORX batteries (I wouldn't) you can probably make them physically fit the Bauker tools and charger but, as the connectors are different, they may not work(?) and/or may not be good for your batteries. Whether Positecworx (the maker) inhibits compatibility just for commercial reasons or also for safety I cannot say but the differences are electrical, not just physical.

I can say with certainty that Guild and older Erbauer 18v batteries appear to be fully compatible with WORX and I have been happily interchanging them without problems for a while now but they are no longer available new. I believe some other brands have neen compatible too (older JCB and Wickes?) but I don't own those to try. Aldi have a mess of different 18v cordless ranges, some of which MAY be compatible (the ones I've tried were not) but they are not even compatible across their own branded ranges!

In conclusion I'd say if you buy these excellent Bauker tools at these low prices then treat them as a stand alone platform, not as an extension to your WORX toolkit.

Finally: note that WORX tools sold in the USA use yetanother battery platform and are not compatible with UK supplied ones.

Hope that helps. Can anyone add more insight? (edited)

NO - it's not compatible with WORX batteries (whatever others may claim)!

Good tool at a good price in its own right though. (edited)