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Group 31 Battery Help

Discussion in '2nd Gen. Tacomas (2005-2015)' started by AcerD, May 10, 2017.

?

What Group 31 Would you suggest

  1. Optima Group 31m

    60.0%
  2. Trojan Group 31

    0 vote(s)
    0.0%
  3. East Pen Group 31

    20.0%
  4. Deka Group 31

    20.0%
  1. May 10, 2017 at 7:56 AM
    #1
    AcerD

    AcerD [OP] Well-Known Member

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    Okay So I am ordering a Pelfreybilt battery cage to hold a Group 31 Battery , but now I have to decide what battery to run. I ran a dual battery system with a red top optima and a blue top optima in my last rig, but this time I am trying to simplify to just one big battery. I found a good price on a Optima Blue top 31m battery but when compared to other similar batteries it seems low on Ah and reserve times. Anyone have experience with this battery or have any suggestions?
     
  2. May 10, 2017 at 8:19 AM
    #2
    knottyrope

    knottyrope Well-Known Member

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    I should go take a pic of my Deka 900 cca one I bought but its parked like 400 feet away so will have to wait an hour for lunch time.

    it is an inch wider and 1/4 in shorter than the stock tow package one, so jut had to add a 1/4 in shim to hold it in place
     
  3. May 10, 2017 at 8:37 AM
    #3
    AcerD

    AcerD [OP] Well-Known Member

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  4. May 10, 2017 at 8:47 AM
    #4
    knottyrope

    knottyrope Well-Known Member

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    I will let you know in about 20 min, it does have the double handles on it and I think reserve was 50% more than original.

    I have played my radio loud when camping for 12 hours with out issue on the OEM one
     
  5. May 10, 2017 at 8:51 AM
    #5
    AcerD

    AcerD [OP] Well-Known Member

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    Okay cool I appreciate it. I have a fridge that will be set up in the bed so that is my biggest concern. I just want to make sure there is enough power to keep that running for a while without starting the truck.
     
  6. May 10, 2017 at 9:56 AM
    #6
    knottyrope

    knottyrope Well-Known Member

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    yes it is that 649MF and here it is sitting in my 09 Taco CCLB 4x4

    649MF.jpg
     
  7. May 10, 2017 at 10:01 AM
    #7
    knottyrope

    knottyrope Well-Known Member

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    As you can see the reserve is like 50% more and its much heavier than the stock one too.

    Part Num
    627MF
    MfgCode EPM
    Original Manufacturer OEM EAST PENN
    Voltage (V) 12
    Condition New
    Group Size 27
    Purpose STARTING
    CCA @ 0° F 710
    CA @ 32° F 860
    Reserve Capacity (Mins) 120
    Reserve Capacity (Amps) 25
    Chemistry LEAD ACID
    Terminal POST
    Length 12
    Width 6-3/4
    Height 9
    Weight 45.5000


    Part Num 649MF
    MfgCode EPM
    Original Manufacturer OEM EAST PENN
    Voltage (V) 12
    Condition New
    Group Size 49
    Purpose STARTING
    CCA @ 0° F 900
    CA @ 32° F 1050
    20 Hr. (Amp/Hr) 100
    Reserve Capacity (Mins) 185
    Reserve Capacity (Amps) 25
    Chemistry LEAD ACID
    Terminal POST
    Length 13 15/16 IN
    Width 6 7/8 IN
    Height 7 1/2 IN
    Weight 52.5000
     
  8. May 10, 2017 at 12:37 PM
    #8
    AcerD

    AcerD [OP] Well-Known Member

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    Awesome Thanks for the info on the battery I'll have to do some more research on this battery
     
  9. May 10, 2017 at 12:49 PM
    #9
    knottyrope

    knottyrope Well-Known Member

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    its like having 1.5 of stock batteries in one based on the reserve capacity

    That's why I bought it so I can play the radio at the beach all day and still start it up later on

    ill be running a test this weekend in my back yard for my house warming party, my truck sounds better than my old Panasonic unit and I have a BlackBerry Z30 loaded with 64 gig of music to stream over Bluetooth to my Stereo Gateway so I can skip songs 30 feet away in my chair next to fire pit.
     
  10. May 10, 2017 at 1:34 PM
    #10
    TacomaMike37

    TacomaMike37 Well-Known Member

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    Interesting. Let us know how long you run it without starting the truck. Im on the beach often and would be cool to play the radio for a few hours without having to worry about running it dead.
     
  11. Aug 10, 2017 at 12:36 PM
    #11
    Taco TRQ

    Taco TRQ Well-Known Member

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    Not a bad upgrade especially if your battery is on its way out.
     
  12. Aug 10, 2017 at 12:42 PM
    #12
    BassAckwards

    BassAckwards Well-Known Member

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    I have a 31M northstar battery, that is a standalone, that i run my fridge off of. I have a 100w solar panel and if i keep the fridge around 35-45 degrees, i cant leave it running indefinitely.
     

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