You can pick up one of these, drip it in your DIY adapter and you’d be set to have all your safeguards in place and for pennies on the dollar. Their is a company that makes the majority of Battery Management Systems for the majority of the proprietary Li-ion brands.

Their is however a third solution I recently stumbled across. IMPORTANT: You’d damn well better make certain your power source is independently protected at all levels as you are disabling your low charge protection with this method and for me the thought “ABANDON HOPE ALL YE WHO ENTER” comes to mind. HOWEVER, finding the proper thermistor resistance (generally anywhere between 4.7 and 10 ohms soldered between T and – tool tab should work.) however this is only in the older Kobalt tools as the newer Kobalt have the additional tool to battery comms.

However, on the newer Kobalt tools their is also comms with the battery to insure the battery does not drop below minimum charge parameters and thus cannot then be identified by the charger.Īs for bypassing the T tab, I believe the only way to safely accomplish this is in the aforementioned explanation. This is consistent with all three wires exiting motor. *This is a comms tab but not in the way you would think.īecause you are dealing with a brushless motor you have three leads where the – tab, the + tab, and the T tab are operating in a forward sequence where upon rotation of motor stator the signal for say the current – tab moves forward to become the + tab and then on the next rotation becomes the T tab and so on and so forth. I would only recommend (at your own risk) using like volt with like volt. And just as you would harvest out the internal Samsung (or whatever brand) individual cell units by snipping away the solder joints when attaching an 120v ac – 24v dc unit, you could use the post harvested kobalt battery top for your mount with a double spade +- conventional battery of your choice within reason. This can be fooled with an adapter from an old battery which could in turn be attached to a homegrown mount. The third tab is both a thermistor and a comms* tab. Here is the explanation and solution I’ve come up with. Posted in Tool Hacks Tagged 18650, adapter, charger, controller, cordless, dewalt, Li-ion, ryobi Post navigation After all, printing an adapter should be easier than whipping up a cordless battery pack de novo.

While took a somewhat brute-force approach here, we imagine 3D-printed parts might make for a more elegant solution and offer other brand permutations. The video below shows the process and the results - Ryobi tools happily clicking away on DeWalt batteries. That meant simply transplanting the PCB from the adapter to the Ryobi battery shell would be enough. Luckily, the donor DeWalt line has that circuitry in the adapter, while Ryobi puts it in the battery. The tricky part came from dealing with the battery control electronics. Mechanically, this was pretty easy - a dead Ryobi pack from the recycling bin at Home Depot was stripped down for its case, which was glued to a Dewalt 20-v to 18-v battery adapter. ’s solution is a pure hack, as in physically hacking battery packs and forcing them to work and play well together. Luckily, we live in the future, so there’s a third way - building a cross-brand battery adapter that lets him power Ryobi tools with his DeWalt batteries. Could he stay true to his brand and stick with his huge stock of yellow tools and batteries, or would he succumb to temptation and add another set of batteries and chargers so he could have access to a few specialty lime green tools? Even though he’s a faithful DeWalt cordless tool guy, admits to a wandering eye in the tool aisle, looking at the Ryobi offerings with impure thoughts.

Dewalt battery cord adapter