charging AGM batteries?

Discussion in 'Electronics & Electrics' started by Dodge M4S, Oct 6, 2018.

  1. Dodge M4S

    Dodge M4S Member

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    Hey guys, I'm putting together a portable boom box and am going to use a 12v 5.4ah AGM battery. I'm a bit confused as to what type of charger this thing needs.

    ive looked around and apparently I need a specific type of charger for it and they seem to range from $50 - $300...

    what would be the cheapest and safest way of charging it?
     
  2. slavewone

    slavewone Member

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    12v LEAD acid yeah?

    Do you have access to a car battery charger?
     
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  3. Privatteer

    Privatteer Member

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    Anything that uses the float voltage of the AGM, usually 13.4V - 13.8V is safe.
    For faster charging some chargers will have a "boost" mode at around 14.4V then drop back to float when they detect the battery has reached full charge.

    Don't use the standard cheap car chargers they charge at around 17V which is way too high.
     
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  4. MacroP

    MacroP Member

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    Last edited: Oct 7, 2018
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  5. Catweazle

    Catweazle Member

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    ^

    That one would be ideal. Gotta be careful choosing one. Just the fact that it's about a 1 amp charger isn't enough. Quite a few of the lower end chargers aren't really suited to batteries of less than 10ah or 20ah capacity.

    Basically any charger promoted as being suitable for motorcycles should be fine, but always check the specs.
     
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  6. OP
    OP
    Dodge M4S

    Dodge M4S Member

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    Thanks guys :)

    This thing is getting a little expensive now, but the things we do to kill boredom lol
     
  7. Recharge

    Recharge Member

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    when it comes to batteries, there is no cheap :/ try getting into hobby solar :p lol $$$$$$$$$$$$$$$
     
  8. Catweazle

    Catweazle Member

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    Aldi currently have a charger that'd suit. About $30.
     

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