Jump to content
Electronics-Lab.com Community

Charging Battery !


Recommended Posts

hi every one, iam new to this forum and new to electronics and iam here with a lot of questions, so in my series of doubts i would like to put out few questions for now!

1. how do i charge a rechrgable battery with a minimal voultage input?

2. to be more precise - i have a 3.7 v 220 mah Lithium polimer cell - i want to charge it using a 12v dc adaptor as a source - how do i do it ?

sorry folks my questions it self could be lame but i dont know where to look for answers please help me!

Link to comment
Share on other sites

Hi Spike,
Welcome to our forum.
Charging a lithium battery presents a severe fire hazzard if the charging is incorrect or if the charger fails. I suggest that you look at your battery manufacturer's website for their recommendations.
We have many articles in our Articles section, and its link button is at the top of this page. There are some articles about charging lithium batteries and one is here:

Link to comment
Share on other sites

Hi Spike,
Please don't make 2 new topics for the same battery charger request. I posted some battery charger precautions and a circuit in your 2nd topic.

The only difference I could find between a Lithium-Ion charger abd a Lithium-Poymer charger is that the polymer battery must be charged slower, at half the current of an ion battery.

Link to comment
Share on other sites

Hi spike0

As audioguru noticed you should be VERY CAREFULL using and charging Li-Ion or Li-Po batteries, as they can cause fire and injuries if impoperly used. First of all i suggest you to read carefully the "Panasonic Li-Ion - Precautions.pdf" i attach you to fully understund what not to do with your battery.

Then you can check "Charging Simplified for High Capacity Batteries - Microchip.pdf" that introduces a simple li-ion charger, that you could build it yourself. Have in mind that no "easy" way exists to charge your battery, you should at least use a protection IC or something.

Take care..



Link to comment
Share on other sites

Hi spike0.
First you must know how many cell's is your battery, then you need information from the manufacture as audioguru say allready, then try to search the net for how to build the charger (My opinion is to use a circuit with microcontroler and battery monitor IC's) and finally you must try again again you charger. Here it is an article for NiCd and NiMH batteries charger. http://www.electronics-lab.com/projects/power/037/index.html

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...