Need a 12v li ion battery charger

[PBhople]

I need a 12v li ion battery(2100 mah) charger circuit with auto cut off. Please suggest something

Attaching photo of battery

 

[Harald Kapp]

Are you sure this is aLi-Ion battery pack? It seems to have 10 cells. A single Li-Ion cell has ~3.6V, so the pack should have 36V, not 12V.
On the other hand, a NiMh cell has 1.2V which matches nicely with 12V for a 10-cell pack.

Here are three circuits of different complexity for charging Li Ion batteries.

 

[PBhople]

Are you sure this is aLi-Ion battery pack? It seems to have 10 cells. A single Li-Ion cell has ~3.6V, so the pack should have 36V, not 12V.
On the other hand, a NiMh cell has 1.2V which matches nicely with 12V for a 10-cell pack.

Here are three circuits of different complexity for charging Li Ion batteries.

Seems strange, shopkeeper told me it is li ion but now, I think it is NiMH thanks but now, how to charge it?

 

[Harald Kapp]

Any search engine will turn up hundreds of circuits for charging NiMH. However, you have to be really sure about the type of battery as NiMH are charged completely different than Li Ion (each battery chemistry has its own charging method).

 

[PBhople]

Any search engine will turn up hundreds of circuits for charging NiMH. However, you have to be really sure about the type of battery as NiMH are charged completely different than Li Ion (each battery chemistry has its own charging method).

Now I am pretty sure it is NiMH and browsing internet....