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Thread: Using a Pro-Find 35 without a 9V battery

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  1. #1
    us
    Mar 2019
    KY
    Fisher Research Labs F2
    121
    92 times
    Metal Detecting

    Using a Pro-Find 35 without a 9V battery

    If you've read some of my posts, you know I hate 9V batteries. I finally finished a working prototype of a 9V voltage booster so I can use a rechargeable LiPo in my Pro-Find 35. Here are a few pics:

    Click image for larger version. 

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    Based on indoor testing, the performance exceeds the stock 9V battery. If you want to learn more, I have a blog post, but I'm not sure if I can post the link here.

    I was hoping to use loose AAA cells for this, but it would require permanent modification of the end cap and I'm not ready to do that yet.
    Last edited by mh9162013; May 04, 2019 at 06:13 PM.

  2. #2
    us
    Aug 2018
    Central Florida
    Garrett At Pro
    314
    245 times
    Metal Detecting
    Looks good. No heat problems with the boost converter? You can add 9v pin terminals and wrap it to make it completely drop in.

  3. #3
    us
    Mar 2019
    KY
    Fisher Research Labs F2
    121
    92 times
    Metal Detecting
    Quote Originally Posted by Darke View Post
    Looks good. No heat problems with the boost converter? You can add 9v pin terminals and wrap it to make it completely drop in.
    None for the few minutes I was using it buzzing it with metal objects constantly. But when I do more testing, I'll pay attention to that. Thanks for your feedback!
    Darke likes this.

  4. #4
    Charter Member
    us
    Oct 2014
    Massachusetts
    Garrett: AT Pro, AT Gold & Infinium; Minelab: Explorer SE, II & X-terra 705; Tesoro: Tejon & Outlaw; White's: V3i & DFX
    23,677
    23301 times
    Relic Hunting
    Banner Finds (2)
    Very nice modification!

  5. #5
    us
    Mar 2019
    KY
    Fisher Research Labs F2
    121
    92 times
    Metal Detecting
    Quote Originally Posted by Professor of Engineering View Post
    Very nice modification!
    Thanks!

  6. #6
    us
    Mar 2019
    KY
    Fisher Research Labs F2
    121
    92 times
    Metal Detecting
    Cleaned up the booster a little:Click image for larger version. 

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    Darke likes this.

 

 

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