3.7V lithium battery charger circuit board

Equipment, Tools & Supplies
1

I am planning to use 3.7V lithium battery as a replacement for old one in cordless screwdriver.
Does anybody can recommend simple soldering charger kit for lithium battery.

https://illumn.com/21700-keeppower-p2150r-custom-wired-5000mah-high-discharge-protected-battery-pack.html

2

Hello,

Welcome to the TechForum.

Are you looking for the battery only or a soldering kit for this? I have battery options below.

21700 battery options
https://www.digikey.com/en/products/filter/batteries-rechargeable-secondary/91?s=N4IgjCBcoMwExVAYygMwIYBsDOBTANCAPZQDa4ALAKwCcNAHCALqEAOALlCAMrsBOASwB2AcxABfQmAY1EIFJAw4CxMiAAMzcZJAJI5GADoA7ADUtQA

3.7V battery pack options
https://www.digikey.com/en/products/filter/batteries-rechargeable-secondary/91?s=N4IgjCBcoMw1oDGUBmBDANgZwKYBoQB7KAbRABYBOMAVgA4A2EAgJgYfPIgPJgAZO3EAHYYYYXxABdAgAcALlBABleQCcAlgDsA5iAC%2BreghDJI6bPiKkKLMLxbNbtWtLmLIK9dr2HwlOkoTMwtcAmJIMkkpPxY%2BYSDoU1RMMOtIkBgAOmEAAgA1NxAFJQBVLQ15AHkUAFkcNCwAVzUcA1ibbOFCmRAmJI0AEyUAWjA%2BIRLPJ3kAT1k2z0bkfX0gA

Thank you
Ryan

3

Hello Ryan!

I am looking for soldering charger kit with components and circuit board for lithium battery

Vr.

Dmitri

4

There are some products here that might be of interest.

5

thanks for the information for open frame charger!!

But, they all less than 2 amp charging current.

But, my battery selection is a Standard Continuous Charging Current: 2.5A.

I need Standard Continuous Charging Current to be 2.5A !!

Dmitri

6

Perhaps something like the MIKROE-6653 or something from this category?

7

David,

Thank you for the information!

you advice is good if I need to control and adjust Voltage and Current on a computer monitor! But, it is too complex!
I found this circuit diagram. It is allowed change charging voltage. I need similar with ability to change charging current also with variable resistor and input AC 110V .

Logopit_1716881459029_
Logopit_1716881459029_1280×720 157 KB

8

Unfortunately I’m not seeing anything viable, it looks like Rick and David have already found the most likely products in our catalog.

9

ok, Thanks!

Dmitri