3.7 V Li ion battery charger

[demetal]

Hi,

can we charge the 3.7 v Li.Ion battery (mobile battery) by directly connecting the + and - wires from the commercial mobile chargers...?

Thank you.

 

[sky_123]

I wouldn't directly connect it. See here for example. Several manufacturers produce ICs for charging.

 

[demetal]

Ok... is it only for Li.ion battery's or for all rechargeable batteries...?

 

[tpetar]

Hi,

can we charge the 3.7 v Li.Ion battery (mobile battery) by directly connecting the + and - wires from the commercial mobile chargers...?

Thank you.

If you mean under "mobile charger", wall trafo with 5V voltage output, of course not!

You need charger circuit for Li-Ion batteries.

 

[sky_123]

Some types are simpler, but there is no battery that is charged by directly connecting to a commercial 5V mobile phone charger.
Unless you want it to go pop.

 

[tpetar]

See this simple USB charger (instead USB 5.0 you can use 5V from your adapter) :

**broken link removed**
Schematic:
**broken link removed**

MCP73832
https://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en026250