★★★★★
Quality cable for delivering clean power using a 5.5mm x 2.1mm barrel connection (e.g. telescopes)
Reviewed in the United States on August 21, 2026
I was in need of a barrel plug cable so that I could connect my 12V LifePO4 battery to my Celestron telescope for extended viewings without the need to plug to an outlet, this cable was perfect for this application. I had purchased a different barrel plug cable that did not have the proper sizing, this one does fit perfectly for my telescope (5.5mm x 2.1mm). I did not have a PP15 plug to connect this wire to so I ended up cutting that end (stripping the cable) and using the simpler spade (female) connectors to plug directly to my battery's male spade terminals. I was comfortable with doing this as the cable itself comes with in-line fuse (and multiple fuses) near the terminal that connects to my battery (great safety feature) as well as ferrite choke to deliver clean power to the telescope. Note that the fuses included are 5A, 7.5A, and 10A; the cable comes pre-installed with the 7.5A fuse which I swapped out with the 5A fuse as my telescope should never exceed that current draw. In addition to this, if connecting to a telescope, ensure that you get the positive/negative leads connected the correct terminals to ensure the polarity needed by your telescope is kept (e.g. Celestron telescopes require center positive polarity where the inner pin is positive, outer ring is negative). Overall, I'm pretty happy with the quality of the cable and it has been working for me without issue after multiple viewings with my telescope.