26650 charger with cut off

[Helios1 (Helios-)]

Thanks Werner for the pictures!
No charge control IC. So it would not be CC/CV.

I’m afraid this is not a good charger guys.

Gut it & add one or two tp4056 usb charger boards inside. $1 on ebay (ebay search). 850mA charge current each, CC/CV chip (won’t overcharge, trickle charge after it shows done or change in termination voltage). HKJ tp4056 review.

It could also make a nice adjustable charging cradle for any other charger like Werner has done.

@Bort

This is my only charger, it is a no nonsense simple device, light turns red when charging, flickers between red and green when almost full, and goes solid green when charging is completed.
Mine terminates at 4.15V, it was 4.19V the first time i used it, but after a few uses it now always terminates at 4.15V. So use it a few times before giving it away to determine its termination point.

Flickering leds is a big sign it has no CC/CV charger IC.
Termination voltage that has ever changed like that is bad.

Review on IO also reports that it continues to trickle charge after light goes green.