Battery voltage for 6 MC-E- Mtbr.com
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  1. #1
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    Battery voltage for 6 MC-E

    Hello

    I have a project on the go to run 6 MC-E in 4P6S using a hipFlex. ( individual die access)

    Therefore I need a battery to supply a max of 24v. However 6 li-ion cells provide 25.2v straight off the charger. And 5 cells provide 21v.
    Can I discharge the 6 cell battery until it reaches 24v?? Or will the 5 cell battery stay in regulation , ie not drop below the vf of the LEDs @ 700mA ~20.4v. I doubt it!
    I will have the battery in a 5S2P or 6S2P config to provide enough power.

    Which option would you go for? Would I be better off just running 5 MC-Es???

    Thanks

  2. #2
    Randomhead
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    I think that design is going to be marginal with that driver

  3. #3
    I spelled Knievel wrong
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    Run 5 MC-E. I have had a few conversations with George at Taskled about a 6-up configuration and he was very clear that the HipFlex would not survive at anything over 24V period, so a 6-up is kind of out of the question unless you are driving from a very well regulated 22-23V DC powersource (not a battery). 5-up will still blow you away with brightness.

  4. #4
    aka RossC
    Reputation: ocean breathes salty's Avatar
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    Quote Originally Posted by StevelKnivel
    so a 6-up is kind of out of the question
    Two hipflex's

  5. #5
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    Quote Originally Posted by ocean breathes salty
    Two hipflex's
    Or one hipFlex (5*MC-E) and one bFlex (1*MC-E 4S)?

  6. #6
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    Quote Originally Posted by StevelKnivel
    Run 5 MC-E. I have had a few conversations with George at Taskled about a 6-up configuration and he was very clear that the HipFlex would not survive at anything over 24V period, so a 6-up is kind of out of the question unless you are driving from a very well regulated 22-23V DC powersource (not a battery). 5-up will still blow you away with brightness.

    Yeah, I think Vf of 21v is a bit too close to the 24v max of the driver. I like the idea of 2 hipFlex drivers!
    However, I like Itess' idea even more. Then I can have silly amounts of light when ever I need it (showing off to my mates with Lupines!) and just the single MC-E when I am on the road or climbing.
    Going to order one from George right now. Thanks for the idea!

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