1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Electronics Charger for 4x3.7V li-ion batteries?

Discussion in 'Modding' started by quizz_kid, 18 Aug 2013.

  1. quizz_kid

    quizz_kid Squid

    Joined:
    19 Jun 2011
    Posts:
    808
    Likes Received:
    51
    Hi.

    I going to have 4x3.7V(=14.8V) li-ion batteries connected in serial and built inside a box, and I want to be able to recharge these.

    Would something like this work?

    The cells are 4900 mAh each
     
    Last edited: 18 Aug 2013
  2. Darkwisdom

    Darkwisdom Level 99 Retro Nerd

    Joined:
    27 Aug 2011
    Posts:
    2,675
    Likes Received:
    63
    Should be fine. Just make sure you ALWAYS use a battery management protective circuit and wire the charging circuit to it if you haven't already. You don't want anything blowing up.
     
  3. Pranja

    Pranja Blackwolf

    Joined:
    18 Dec 2011
    Posts:
    1,171
    Likes Received:
    24
    It will work fine. I recommend finding old laptop battery with same voltage value and using circuit of that battery,
     
  4. quizz_kid

    quizz_kid Squid

    Joined:
    19 Jun 2011
    Posts:
    808
    Likes Received:
    51
    Here are the specs of the batteries I've got:

    Voltage:3.7V
    Capacity:4900mAh
    Rechargeable battery with PCB
    High rate discharge,no memory effect
    Short circuit,over charge and discharge protection
    PCB life is around 10 years
    It is green

    It says it has protective PCB... I bought them cheap on Ebay though. Should I consider another circuit?
     
  5. Darkwisdom

    Darkwisdom Level 99 Retro Nerd

    Joined:
    27 Aug 2011
    Posts:
    2,675
    Likes Received:
    63
    A lot of the time those cheap ebay ones can be okay. The Protective circuits however, can be a bit dodgy. Despite being from the UK, i've found www.batteryspace.com to be the best site around.
     
  6. quizz_kid

    quizz_kid Squid

    Joined:
    19 Jun 2011
    Posts:
    808
    Likes Received:
    51
    Could be worth spending some extra $s for safety reasons here I guess. Thanx Wisdom!
     
  7. Darkwisdom

    Darkwisdom Level 99 Retro Nerd

    Joined:
    27 Aug 2011
    Posts:
    2,675
    Likes Received:
    63
    That's the truth. In a portable console/computer, the worst thing to go is the batteries. They could take your whole project with them!
     

Share This Page