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  1. #1
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    Mixing batteries (AGM, Wet Cell) with same charger?

    My starting battery is too small and thus I'm going to upgrade to a Sears Platinum 31M. My trolling batteries are interstate 27's I think, will double check tomorrow. I have a BassPro XPS the XPS iT 5/5/5 charger.

    1) Can I mix the two different types of batteries on the same 3 bank charger?
    2) Any recommendations on a AGM starting battery other than the one I noted above?


    Thanks in advance.


    p.s. I can't seem to find much on BBC about AGM batteries.

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  3. Member
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    #2
    BassPro Shops, Manteac, CA doesn't know either but they are still researching the question. There is a switch to change settings for Wet/AGM/Gel.

    BTW: my trolling batteries are Deka Marine Master. Couldn't find a model number but the label says DC27 which is supposed to be 575 CCA according to Deka. But the stats on my label say 650 CCA which actually matches the DP27. I don't know.


    P.s. BassPro called back and said it didn't matter as long as correct volts were going in it would charge. When I asked him "If it doesn't matter why would they put a switch for the different style batteries?". He said he didn't know.
    Last edited by BigMouth; 11-10-2012 at 12:00 PM.

  4. Electrical/Wiring/Trolling Motors Moderator CatFan's Avatar
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    #3
    The difference is peak voltage. Many AGM don't tolerate more than 14.8V or so. For now, set it to AGM until you can figure out what your battery will handle and what the output of your charger is at different settings.
    Stay strong Lea!

  5. Member
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    #4
    Just got off the phone from a friend that explained with the newer AGM's it don't matter. The switch is for older AGM batteries that don't tolerate high peak voltages. Sigh . . .

  6. Member
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    #5
    Quote Originally Posted by BigMouth View Post
    Just got off the phone from a friend that explained with the newer AGM's it don't matter. The switch is for older AGM batteries that don't tolerate high peak voltages. Sigh . . .
    That is quite true but a bit of an oversimplified answer as it does matter on newer AGMs too. Too complex to fully explain here, but AGMs have slightly higher charging voltages to truly be 100% state of charge especially in the Float or final maintenance stage.. A charger needs to have a user selected AGM switch so it knows to adjust and provide the higher optimum recharging profile voltages needed.

    MinnKota is introducing an entire line of Precision On board chargers to accomplish this as their current Digital chargers do not.
    happy 'trails',


  7. Member illinifish's Avatar
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    #6
    Quote Originally Posted by BigMouth View Post
    My starting battery is too small and thus I'm going to upgrade to a Sears Platinum 31M. My trolling batteries are interstate 27's I think, will double check tomorrow. I have a BassPro XPS the XPS iT 5/5/5 charger.

    1) Can I mix the two different types of batteries on the same 3 bank charger?
    2) Any recommendations on a AGM starting battery other than the one I noted above?


    Thanks in advance.


    p.s. I can't seem to find much on BBC about AGM batteries.
    I use Cabelas AGM
    Enjoying life in Southern Illinois

  8. Member
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    #7
    My charger has a switch for Flooded/AGM the other for Gel/AGM HP (High Power). I've found several different answers.

    In the user manual it does say 2/3 of the way through . . .

    . . . "Do NOT mix battery types on-board. ALL batteries should be of the same age and in good operating condition."

    Heh . . .

    Rep at BassPro Manteca, CA says it don't matter . . .

    Still searching for a non-conflicting answer, Sigh . . .

  9. Member
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    #8
    Quote Originally Posted by BigMouth View Post
    My charger has a switch for Flooded/AGM the other for Gel/AGM HP (High Power). I've found several different answers.

    In the user manual it does say 2/3 of the way through . . .

    . . . "Do NOT mix battery types on-board. ALL batteries should be of the same age and in good operating condition."

    Heh . . .

    Rep at BassPro Manteca, CA says it don't matter . . .

    Still searching for a non-conflicting answer, Sigh . . .
    Both answers are correct.....

    Mixing different series connected battery types should be avoided "IF" the user is not monitoring the voltages during discharge and may possibly be over discharging the weakest battery by more than 50% state of charge.

    If you invest in a battery voltage monitor and carefully monitor it during the use of the batteries, stopping to recharge anytime a weaker battery reaches 50% state of charge or about 12.3 volts, then different battery types and ages can work fine together.
    happy 'trails',


  10. Member
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    #9
    Okay just got word from TechSupport at ProMariner the manufacture of my charger . . .

    A BassPro XPS XPS iT 5/5/5 made for BPS by ProMariner.

    The tech said Go Fishing! It's designed to charge Flooded/AGM in the default straight from factory setup even if you have one AGM starting battery and two Flooded for trolling motor like I have.

    However, don't mix Flooded/AGM with Gel.

    Thanks for all the hep everyone!