Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: where do you get a 12V plug/cord for this charger?
Document: its a pretty simple unit. power cord going to contacts to the battery. plastic case is just to hold the battery, there is nothing inside but metal contacts going from the plug to the battery it feels like. so tried again. yes once again i thought i was about to die and hand to pull the power cord out of the unit as fast as possible before it blew up in my hand. super lame since it did have some reviews. seller is super lucky I'm lazy and didnt get a refund. forget it ill just eat the $10 loss and blame it on my stupidity for buying it.
I am able to recharge batteries. Initially,  batteries stay cool when charged while the charger gets warm. After about a half hour charging, battery also warms up. I disconnect it when the  battery being charged cools down and usually within 3-4 hours.There is no product manual. There is no on/off switch. The LED shows RED when charging. GREEN when no battery is inserted.Besides the AC cord input,  there is  a12V input presumably for car/truck 12V adapters or any 12V adapter that is 500mA or less (less means more charging time but safer).There is a selector for 3.6V or 3.0V.
ok im going to start this one off by Note:This Charger wont charge a Uranus-Fire-1000 maH 16340 the brand? . But my 18650's charged just fine :)UltraFire other than that there is two input options! 12V 500MA And 120-240V 50-60Hz-Wall this is a great charger
I've been using this charger for a while now.Pretty happy with it although the cord died on me recently.I guess the wire breaks inside.Overall a good purchase.
Purchased two of these along with the purchase of 10 14500 batteries. and I also have CR123A's and 18650's so, these are just perfect and they are constructed very well with a sturdy cord and they hold the batteries securely. I would recommend these to anyone using any of the batteries that this universal charger handle and the price is very good.
I use this on my 3.7v 18350 batteries. A switch on the side lets you choose between 3.0v and 3.6v, but it seems to do fine with my 3.7v batteries. Charges nice and slow, LED indicates whether its charged or not. Has a place for DC plug not included. Best charger for price I have seen.
This unit is cheap. The LED's do not function properly.There is no selector for changing from 3.0v to 3.6v.Save some money and get a better charger. Something that has a discharge feature & better circuitry.Your batteries will charge more fully and last longer.
I can always keep a set of freshly charged batteries for photo devices. The charger I have charges the battery in the device, but sometimes that is not possible (in the &#34;field&#34; photography). This lets me keep extra batteries and lets me charge them back up when I get back to a convenient spot.
This charger system does not cost a lot, does the job on a variety of Rechargeables, can do individual batteries vs. having to install two at a time, and incorporates the Red (charging), and Green (charged) LEDS as indicators. Of the many low cost chargers out there at this time, I have had my share of those really cheap quality square-box plug in chargers that half the time do not work, and their internal circuitry is not much more than a Varyistor & Zener Diode. This unit is considerably better quality.
I don't really have complaints about this charger. It works, but it's a bit large for my needs. If you're charging several sizes of batteries then it'd probably be great for you. The supplied power cable is plenty long, but it's a standard size so chances are you might already have the same nema spec cord in case you needed one longer/shorter. The springs on the contacts are a bit tight at first, I launched a couple of batteries across the table letting them snap shut... also made it kindof hard to remove charged batteries until I figured out the best way, for me anyway, to pull back the contact.
Answer: Radio Shack is the only place that comes to mind.  Take the device with you since they have a way to measure the input port for the right plug.The other way would be to use a standard car to 110 inverter.