10 Pack DC Power Male Pigtail Connectors 2.1 x 5.5mm Copper 10 inch Length

I tested all ten of these pigtail connectors, and all of them tested correctly, with the red conductor going to the center pin, and the black conductor going to the outer sleeve. I also tested for electrical shorts between the two conductors and found no shorts. The wire gauge is very small, but more then sufficient to drive my video cameras with infra-red lights. The pigtails arrived with all of the conductors pre-tinned with a tiny amount (1/8") of solder. I stripped about a 1/2 inch more insulation from the wires and soldered the exposed conductor, Then I doubled the conductor in half, and crimped this into the spade lugs and push-on connectors. When I split the red wire from the black wire to route them to different locations on my distribution panel, the black wire ended up being mostly black with a vertical red stripe. To ensure these conductors were solidly black, I merely used a black permanent marker on them. Everything was fine with this order!

These work great. I used these to convert 4.5V battery powered devices to 5V USB (links below) plugged into a USB AC plug. (Specifically, I converted LED candles and an LED light that use 3-AAA batteries.)Link to "HDVD New 10pack 10 inch(30cm) 2.1 x 5.5mm DC Power Pigtail Female". I bought this 10-pack for $6.90, free ship, in Nov 2014:http://www.amazon.com/gp/product/B00CUKHN0S/ref=cm_cr_ryp_prd_ttl_sol_10Link to "StarTech.com 2m USB to Type M Barrel Cable - USB to 5.5mm 5V DC Cable - USB to Barrel Jack 5V DC Plug (USB2TYPEM2M)". I purchased these for $3.12 each with free shipping in Nov 2014:http://www.amazon.com/dp/B009C3CJG4/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=14QD47WGOMLTX&coliid=IHBBM3CI3ZDLALink to "Neiko 5-Piece Soldering Iron Kit Set". I bought this in Dec 2014 for $12.95 with free shipping:http://www.amazon.com/dp/B005HY02FW/ref=wl_it_dp_o_pd_nS_ttl?_encoding=UTF8&colid=14QD47WGOMLTX&coliid=I3118JHOSHYHAQLink to "DC Female to 4 Male Power Splitter Cable for CCTV". Optionally use this to power 4 devices from one USB AC plug (caution: too many devices may overload/overheat the USB AC plug!). I bought this in Nov 2014 for $3.83 with free shipping:http://www.amazon.com/gp/product/B004EAMFDC/ref=cm_cr_ryp_prd_ttl_sol_3

Great extra power ends for your CCTV camera power supply. These work great if you are adopting a switching power supply to drive your CCTV cameras. Easy to hookup and lets you customize the exact number of power connectors you need.Arrived well packaged and in excellent condition. Leads are short, but already tinned. Center is positive and leads are long enough you can hook several together if needed.Solder the leads and cover with heat shrink tubing for a permanent connection.

These are nice connectors, but note that the actual size of the copper wire is around 26 gage. The size of the wire in the photo looks heavier than it is. Fine for what I need, and a great deal at this price. But may not be suitable for high current applications

Overall, I like the construction. The DC barrel connector fits snugly and conducts well with the other adapters I have.However, on testing the unit hooked up with a DC power source and my light unit, the thin wires that are attached to the DC barrel adapter started to get warm. I also found that the amount of energy reaching the unit was definitely much lower than what the AC->DC adapter was capable of producing.I wish that HDVD had used a thicker gauge copper wire. The ones included in the 10" length is rather thin and are not capable of carrying higher currents without warming up the outer plastic sheath very noticeably.The use case I was using these for: battery replacement for a 4xAA powered camera flash. I had hooked up a 5V@10A AC->DC barrel adapter wall wart to these adapters and wired it to the dummy battery in the flash. The flash powered on and the flash capacitor charged up. However, due to the thin copper wire in the leads, the high current draw of a flash re-cycle caused the wires to get warm and the recharge for full flash discharge was 2-3 times the length of time I would have waited with just batteries. :(So for low current usage, these are probably fine. But for moderate to high current, I would use something else.Gave 4 of 5 stars because of the thing wiring. Otherwise, it's a nice set of female dc barrel adapters.

I got these to use with power bricks. They work well and fit standard 12VDC connectors, such as cameras. Good product and a great price.

Overall a good product. I did have one dead cable in the pack that would not output power. The cables that did work were perfect for my projects.update 7-18-14I was overall pleased with the first pack i received so i ordered two more. But the 20 i received are different from the the 10 i got the first time. They are of course the same plug type, a 2.1 x 5.5, but the plug is redesigned. it doesn't look like the one in the picture. i was using these in a device that i had 3d printed to use that specific head. now that i have these they don't fit. i am going to have to redesign the part to work with these plugs which is very frustrating. because of that i am lowering my rating from 4 stars to 3 stars. I would attempt to contact the seller but it would cost way too much time money and energy to return this for an exchange.Update 7-28-14So out of the additional 20 i received i have had one bad one. not really a problem but i am still aggravated that they are different from the first batch. If i move to injection molding of my product i need them all to be the same.