Hmn...that your battery is fully charged if not slightly over-charged? You're welcome.

@Windows7ge The maximum charge for 18650 batteries is actually 4.2v.

But no, you started talking about 7 segment displays and I thought that one would be useful with my solder fume extractor due to me wanting to incorporate a PWM controller in it (the PWM controller has a resistor to smooth out the voltage, so it will give a proper voltage reading instead of 12v 0v over and over).

Mine is better than yours since it's blue

I could have ordered blue. If I happen to find green I'll go that route.

For my future desktop enclosure I plan to build I'm going to use LM2596's, de-solder the trimmer pot and replace it with a potentiometer then connect the sense wire of a 7 segment display in parallel with the output, a on/off switch in series with the input and powering the display in parallel with the switch so when I kill power to LM2596 to turn off the fans that I'll connect, the display will show 0.00V. That will just be my indicator that those fans are off.

Quote

If I happen to find green I'll go that route.

https://www.amazon.com/DROK-090554-Ultra-small-0-100V-Motorcycle/dp/B00C58QIOM/ref=pd_aw_fbt_328_img_2/134-9460097-6531548?_encoding=UTF8&pd_rd_i=B00C58QIOM&pd_rd_r=25c89e14-9480-11e9-ae04-d30f34518433&pd_rd_w=X5ZPu&pd_rd_wg=GIpAz&pf_rd_p=3ecc74bd-d08f-44bd-96f3-d0c2b89f563a&pf_rd_r=VXPXY47QJF8PTG6CJVXP&psc=1&refRID=VXPXY47QJF8PTG6CJVXP

My usual source Green is out of stock.

https://www.gearbest.com/diy-parts-components/pp_604903.html?wid=1433363#goodsDetail

But I could pick up 1 in either Blue or Red for <1/3 the price or 3 for less than 1 of those Green displays on Amazon.

There are cheaper options, but for some reason green is a bit harder to find then red or blue. 

You have to buy packs of 5 or higher if you want good prices on Amazon though. 

I have a prime account and am impatient, so I tend to favor Amazon. 

GearBest has a tendency to take 30 days to deliver. Cheaper but you have to order stuff way ahead of time. Of the two I'd rather wait if it means paying >=60% less.