Lithium battery charger control - auto cut off 8,4v - step by step

In this video i gonna show you how to do a lithium battery charger 2s, 2 x 18650 lithium cell in series (7,4v). This is a easy charger control using a few componentes and a 9v dc power supply. Enjoy!

[@maniekmankowski4974]

What kind of reley is this, what is write on it?

[@hugoyapur6325]

saludos desde paysandu Uruguay .

[@jankowalski-vu9wj]

Jest ok. Dobrze byłoby gdybyś dołączył schemat.

[@giridharisingh7881]

Superb

[@-ruchira-9124]

bro is this start charge again when battries going low..

[@TipsandTricks-zh1pz]

Hi bro, this circuit just cut off the charge....so you need reset to start again.

[@kywildcats4089]

110v or what??

[@TipsandTricks-zh1pz]

You need a 9v power supply to feed this circuit.

[@kywildcats4089]

@@TipsandTricks-zh1pz Do you know how or do you know any type of site that knows how to make a high voltage converter POWER SUPPLY DC to 9 volt dc to 20kv dc adjustable. For a EP33 525, 350 TO 900 NM, FIREFIELD NIGHTFALL 1ST GEN,. PHOTOCATHODE

[@GoogleTakesYourPrivacy]

аммм...Why 8.4???? 2x3.7 isnt a 7.4? And what will happen with the cells, when they are overcharged???

[@TipsandTricks-zh1pz]

3,7 is a nominal voltage, but the cell can be charged at 4,2v to full charge, so 2 cell reach 8,4 volts in full charge.

[@kywildcats4089]

@@TipsandTricks-zh1pz thank u!! Do u know how to make a DC/DC high voltage converter! 9volt dc to adjustable 20kv dc!?? I need one to power my intinsafier tube! EP33 Fairfield nightfall 1st Gen photocathode EP33-US-525 POWERED WITH 20KV AND 350+900nM . What ever that means! !! Can u, or would u try to show me how, a dumby can make one or Reverse engineer from other kind of circuit!