Gikfun Gikfun 9v Battery Holder with ON/OFF Switch for Arduino (Pack of 2PCS) EK2107x2

I like the size of the holder. It does not take up much room. It seems to be sturdy. One note for guitar players- this item does not work on effect pedals as built. I had to reverse the leads tp change the plug to negative center. I clipped the leads in the middle//stripped 1/2" of the insulation of each one//tinned the ends with solder//reversed the leads//soldered them back together//sealed the connections with heat shrinkable tubing. They work perfectly now. 5 Stars because I knew what I ordered and what I had to do to make them work with my effects pedals.

These 9v battery holders work great and are beefy. However, they are pricey compared to other available options. You only get two and they come with standard DC barrel jack plugs. The on and off switch works well. Just make sure to insert the battery correctly. It’s a bit cumbersome.

No issues so far. Still on first 9 volt battery in months.

Used these for the cheap $50 oscilloscope so I did t have to plug it in a wall outlet. Just used some Velcro to stick on the back and it works perfectly for setting gains on amps and other misc jobs.

1 of 3 worked. On/Off switch does not work. If you bypass the switch, they still don't work due to bad & cheap connector. Connectors to battery broke just by disconnecting the battery.