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when is it time to replace a SAFT battery?

Discussion in 'Shearwater Research' started by rjack321, Aug 10, 2019.

  1. rjack321

    rjack321 Captain

    # of Dives: 1,000 - 2,499
    Location: Port Orchard, WA
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    Specifically in a predator? I can see the voltage just not sure what the "replace when convenient" mV and "replace now!" mV might be.

    Thanks
     
    taimen likes this.
  2. a878bob

    a878bob Manta Ray

    # of Dives: 1,000 - 2,499
    Location: Michigan
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    43
    The way I remember it is yellow battery replace soon, red battery replace b4 getting in the water, I think the red comes on when the voltage is 3.2.

    I dive my petrel controller and Perdix backup much more than my predator these days, but I’m pretty sure that’s how it rolls.
     
  3. davehicks

    davehicks Barracuda

    # of Dives: 1,000 - 2,499
    Location: Seattle
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    The Predator is notorious for warning of low battery early and often. I usually waited until it consistently warned for two or three dives. Very often it will go quite again and give you numerous additional hours.
     
  4. Shearwater

    Shearwater Dive Equipment Manufacturer

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    Hi, rjack. For the Petrel 2 controller I dive with, I use 3.3 V as my minimum. I'll ask the engineers about the Predator on Monday. Is it for a KISS monitor?

    Cheers
     
  5. rjack321

    rjack321 Captain

    # of Dives: 1,000 - 2,499
    Location: Port Orchard, WA
    8,974
    2,828
    113
    Mine is a predator ext

    Well its the primary ppO2 monitor on a CCR so I'm happy to replace it early
     
  6. happy-diver

    happy-diver Skindiver Just feelin it ScubaBoard Sponsor

    # of Dives: 100 - 199
    Location: same ocean as you
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    Saft if it is not a knockoff and if it works at all, is just not worth it nor are rechargables
    Photo lithiums easily accessible so change them when you like or change them often.
     
  7. davehicks

    davehicks Barracuda

    # of Dives: 1,000 - 2,499
    Location: Seattle
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    201
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    The problem is that it will sometimes warn on a brand new cell. It is the biggest design flaw of the Predator. The Petel is so much better in this regard. I've had two Predator EXTs and now two Petrel2s in the family
     
  8. Dsix36

    Dsix36 Solo Diver

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    I have experienced this false warning too. It used to be a common issue back when the Predator first came out and people were spending a fortune on Saft batteries. That issue has basically been resolved with the help of Shearwater. It seems that those batteries sometimes need a bit to "wake up" if stored very long and also some of them were not very good from the beginning (yes brand new batteries that obviously were not very fresh). Many of us have built small load testers that we test each Saft prior to installation. this seems to have sorted my issues entirely. I just built one for my girlfriend a few weeks back when she began to have the same issue.

    As posted above, 3.3v is the recommended minimum voltage to begin a dive. 3.0v is the minimum when load testing.
     
    RayfromTX likes this.
  9. JonG1

    JonG1 Nassau Grouper

    # of Dives: 2,500 - 4,999
    Location: Glossop UK
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    My predator battery died yesterday with around 30 mins of stops left, every day's a school day, now know to change at around 3.4/3.3v
     
  10. tbone1004

    tbone1004 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: I'm a Fish!
    Location: Greenville, South Carolina, United States
    15,692
    7,020
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    I'd replace it now with a rechargeable 14500 and not have to worry about expensive batteries prone to knockoffs. Perks are they charge in the same chargers as 18650's
    That's what is in mine. Have to replace them more frequently obviously, but I have a pair of them and just pop one in before each trip
     
    OceanEyes and Asheron like this.

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