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USED HEADWAY 38120 HP 3.2V 8AH LIFEPO4 BATTERY

USED HEADWAY 38120 HP 3.2V 8AH LIFEPO4 BATTERY

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$5 USD on Battery Hookup
THESE CELLS HAVE ALL BEEN VOLTAGE TESTED AND INSPECTED TO BE IN PERFECT WORKING CONDITION AND HAVE ALL BEEN REMOVED FROM WORKING MODULES. WE HAVE TESTED THOUSANDS OF CELLS OUT OF THESE MODULES AND WE HAVE BEEN AVERAGING AROUND 90-95% CAPACITY. WE GUARANTEE NO DEAD CELLS AND AT THIS PRICE YOU CAN'T GO WRONG. THESE ARE BIG CELLS WITH A CRAZY AMOUNT OF POWER. EACH CELL IS RATED AT 200A DISCHARGE AND CAN BE CHARGED AT 80A. WE LITERALLY STARTED A CAR WITH 4 OF THESE IN SERIES. PLEASE BE CAREFUL WITH THESE AND DO YOUR RESEARCH. THIS IS A MASSIVE AMOUNT OF POWER. LIFEPO4 ARE THE BEST OPTION FOR 12V BATTERIES BECAUSE 4 IN SERIES IS EQUIVALENT VOLTAGE TO A LEAD ACID BATTERY. WHICH MEANS RV, EV, COMPETITION AUDIO LOOK NO FURTHER. MOST OF YOU WILL MAKE CUSTOM BARS FOR THESE, AND SOME WILL USE THICK GAUGE WIRE OR WELDING. JUST KEEP IN MIND HOW MUCH POWER THESE THINGS ARE CAPABLE OF AND USE THE PROPER THICKNESS TO CARRY THAT POWER FOR WHATEVER YOUR APPLICATION WILL BE PULLING FROM THESE. THESE ARE 40 TIMES MORE POWERFUL THAN MOST 18650 BATTERIES. CHECK OUT THE SPECS BELOW, THESE ARE REAL SPECS. chemical composition LiFePO4 Nominal Capacity 8Ah Charging voltage 3.65V Nominal Voltage 3.2V Cut-off Discharge Voltage 2.0V Charging Method CC/CV Maximum Discharge Current(continuable) 200A Maximum Charge Current(continuable) 80A Cycle Life 1500cycles 1C 100%DOD 2000cycles 1C 80%DOD Work temperature Charge -10℃ to 45℃ Discharge -20℃ to 65℃ Energy Density 83 Wh/Kg Initial Internal Impedance <4mΩ Dimension(mm) Diameter 38mm Length 120mm(152 with screw) Weight(g) 360

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  1. Theslaking

    Lithium Batteries - Any Reason Not To Use?

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     by JohnnyOhh
    1. JohnnyOhh

      · Registered
      Joined
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      753 Posts
      #9 ·
      so what i have learned, ... the batteries are not necessarily that much lighter in weight, they might be more in the 50% weight reduction range. also, there are many forms of lithium batteries. you probably would want to look at lithium iron phosphate battery (LiFePO 4 battery) or LFP battery. easiest to get into. (y) (y)

      Genuine Lithium Batteries for DIY Projects – Battery Hookup

      USED HEADWAY 38120 HP 3.2V 8AH LIFEPO4 BATTERY – Battery Hookup

      Theslaking said:
      Wouldn't my alternator charge the batteries fully rather quickly?
      Click to expand...
      this is a really good question. i have not really seen a lot of info/data on this question. i picked up some of the headway cells, i'm in process of putting a pack together to test out. but a lot of guys have used this them successfully from my understanding. this is a maybe a complicated question, i suspect. some of the lithium batteries are rated based on alternator charging capability. you have probably seen that already.
       
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  2. J

    Can I mix lithium battery with lead acid?

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     by quickaudi07
    1. JohnnyOhh

      · Registered
      Joined
      ·
      753 Posts
      #8 ·
      you are correct the cells have no built in protection,... raw.
      it seems like they can do 80A continuous charge per cell,
      and 200A continuous discharge per cell.
      i assume they can tolerate higher level for a shorter time.

      "USED HEADWAY 38120 HP 3.2V 8AH LIFEPO4 BATTERY"

      you think the batteries would get so depleted they would draw that much from alternator?
      ... i guess it depends on how much / how long current is drawn off of them....

      you have any charge controller systems you like / recommend?

      the stuff you are saying could happen, but not guaranteed to happen, .... depends on how much current is drawn and the guys alternator charging voltage.

      🤷‍♂️

      Dark Winter said:
      You really should use a battery management module with these. Yes; they are more robust than other lithium chemistries from a safety point of view, but there's other concerns as well.

      Without a charge controller, you are likely going to exceed the max charging rate and end voltage on the cells as well as put excess stress on your alternator. Also, I think these are raw cells, without any internal voltage cutoff chips. The result will be reduced cell lifespan; and potentially immediate cell failure upon exceeding the lower discharge limits.
      Click to expand...
       
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