A simple voltage tester. No multimeter or probes required.
-$2.50 battery charger>
-$6.00 voltage display
That's It!!
For under $10.00 you have a voltage tester. Just pop in a battery and presto, instant readout. The cradle is spring loaded and adjusts to any size cell.
Sorry. There were supposed to be images included with this post but they didn't work and I cant figure out how to insert them.
SEE DOWN TWO POSTS FOR PICS.
Links? Accuracy? I bought one of those very exact voltage checkers from ebay, and it shows something else than my DMM and BC700..
A simple voltage tester. No multimeter or probes required.
-$2.50 battery charger>
-$6.00 voltage display
That’s It!!
!
!
!
!
For under $10.00 you have a voltage tester. Just pop in a battery and presto, instant readout. The cradle is spring loaded and adjusts to any size cell.
Nice work, but as stated before, I'm not sure if these really are accurate.
It gives me the exact same reading as my multimeter.
Yes , I used to have a meter like that !
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No links or instructions?
-A really cheap charger from china.
-A two wire voltage meter from china
-Unscrew the two halves of the charger
With a battery in the cradle just touch the wires to find your positive and negative until the display lights up. ( it doesn’t matter where as long as you get a + & )Don’t worry about screwing up things on the circuit board because it won’t be a charger anymore.
-Drill a hole somewhere to feed in the wires, solder the wires and screw it back together.
-Glue the meter where you want it. (I used silicone)
It works great, and a lot handier than dragging out your multimeter all the time.
I glued the prongs for the wall outlet in the folded position so no one would plug it into the wall.
This is quite good, and can be modded to test unprotected 18650s:
http://dx.com/p/3-5-lcd-digital-battery-power-level-tester-24219
It’s what I used most of the time since it’s more convenient than a multimeter.
Just beware it’ll be off by a tad on lithium batteries since it puts a small load across the device (to make sure dead alkalines don’t lie :), and it assumes a 1.5v cell)
And here’s on eready-made wich apparently receives 18650s in stockform.
Unfortunately no LCD display of voltage 
But it is so cheap that Im thinking off moding it with LCD tester. Or just buying it for the heck of it.
BTW, I bought THIS - http://www.ebay.com/itm/130652365824?ssPageName=STRK:MEWNX:IT&\_trksid=p3984.m1439.l2649 - voltage indicator. DOdnt have time to install it yet.
Have I bought correct one? (If yes, thats half the price mentioned)
I couldn’t even figure out how to install that one. Mine has only two wires and needs no external power source.
This is the one I used. http://www.ebay.com/itm/0-4-Red-LED-Digital-Voltmeter-DC-1-7-25V-Lithium-Ni-MH-Battery-Power-Monitor-/280944215974?pt=LH_DefaultDomain_0&hash=item41699487a6
That one works perfect, I’ve used the same on my battery tester. I’ve also used the same charger as OP, works OK.
I cut a hole in the charger and glued the tester to the charger so only the display is visible, but the glue wasn’t strong enough so some parts are a bit loose at the moment. But it still works and gives the same reading as my DMM (although it should be mentioned that the DMM is a cheap one).
That’s only going to work with 1.5v cells, not lithium.
Maybe so, but the picture in the listing is misleading than… you see that blue cell, its 18650 li-ion
Better price ($2.33) but excludes countrys, like Russia and US.
I guess Agenthex mod it to open more.
Lennart
Yes, you can cut the plastic “rail” it slides on and the tab that slides to extend the range of motion to include flattop 18650. Pretty easy to do.
In order to measure protected or nippled 18650, though, the tab won’t hold onto the rail anymore (past the possible range of the case) so you have to “freestyle” it.
Very nice
I cant figure it out either…
