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Step 5Modify (or Build) The Charger
You'll need something for the other end of the DC-carrying extension cord to attach to, and this something will be an AC outlet connected to the charger.
Easy way to do this: run some aluminum foil or a wire to the point of connection between battery leads and charger. On most modern chargers, you'll need to put a discharged battery in the charger before you can provide any current to the tool. I tried this, and my corded adaptor would stop working whenever the battery became fully charged.
The way I did this: connect to the battery charging terminals, but from inside the charger. This lets me use the charger to recharge a battery while also powering a tool via the corded adaptor, and I don't have anything interfering with the charger connection to the battery. I meaured >10 amps output when a battery was not inserted using this method, so be careful: hooking a tool up to this might turn it / the charger / you into a charred chunk
Yes, both of the aforementioned methods probably increase the likelihood of battery or tool explosions or other nastiness occurring.
Smartest way to do this: measure the current and voltage provided by your battery and create an ac-dc adaptor that'll output this.
Easy way to do this: run some aluminum foil or a wire to the point of connection between battery leads and charger. On most modern chargers, you'll need to put a discharged battery in the charger before you can provide any current to the tool. I tried this, and my corded adaptor would stop working whenever the battery became fully charged.
The way I did this: connect to the battery charging terminals, but from inside the charger. This lets me use the charger to recharge a battery while also powering a tool via the corded adaptor, and I don't have anything interfering with the charger connection to the battery. I meaured >10 amps output when a battery was not inserted using this method, so be careful: hooking a tool up to this might turn it / the charger / you into a charred chunk
Yes, both of the aforementioned methods probably increase the likelihood of battery or tool explosions or other nastiness occurring.
Smartest way to do this: measure the current and voltage provided by your battery and create an ac-dc adaptor that'll output this.
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