northwest QED powering
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australian electronic gold prospecting forum.com  |  Pi metal detector by Bugwhiskers  |  QED Detector ,latest updates  |  Topic: QED powering 0 Members and 1 Guest are viewing this topic. « previous next »
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bugwhiskers
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« on: Monday December 26 2016 16:14:39 AEDT PM »

The links below show the ideal battery charger for the QED, 240v or 12v car charge 12 NiMH batteries at a time.
Yesterday I performed an endurance test and with 2 * 6 (12) ALDI AA NiMH rechargeable batteries the detector will run from 9-10 hours. 24 batteries from ALDI, enough for 1 set and a spare set will cost just 6 * $5.99, a measly $36. I have used ALDI NiMH for many years I can attest to their longevity.

  

  

Pics of the battery box and its mounting along with the stand and external amp/speaker attachment will be posted in a few days.
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Davent
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« Reply #1 on: Monday December 26 2016 17:35:33 AEDT PM »

re aldi AA,s.....

  
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bugwhiskers
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« Reply #2 on: Monday December 26 2016 18:11:20 AEDT PM »

All NiMH batteries self discharge. The ENELOOP battery sought to minimise this.
The solution is simple, charge in the car on the way to your prospecting patch and have the spare set charging ready for your return to the car at lunch time. I have purchased around 30 batteries over the last 4 years or so and have never had to throw one out.
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Doug
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« Reply #3 on: Monday December 26 2016 19:06:02 AEDT PM »

Could people use these batteries if they wish? But much more expensive.
Panasonic Eneloop Pro NiMH AA Batteries 2450mAH 4 Pack
  
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« Reply #4 on: Monday December 26 2016 19:55:51 AEDT PM »

  
Could people use these batteries if they wish? But much more expensive.
Panasonic Eneloop Pro NiMH AA Batteries 2450mAH 4 Pack
  
doug smile

People can use any AA battery. Alkaline, NiCd, NiMH etc.
There is a Lithium solution also, pics and info by Wednesday.

  

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Lachlan
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« Reply #5 on: Monday December 26 2016 23:03:55 AEDT PM »

Anyone know much about Kentli batteries. They have a rechargeable Lithium AA battery wired to 1.5v they claim that the batteries have a capacity of 2800mWh which matches Eneloop Pro but are lighter. More expensive too.
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« Reply #6 on: Tuesday December 27 2016 12:33:41 AEDT PM »

  
Could people use these batteries if they wish? But much more expensive.
Panasonic Eneloop Pro NiMH AA Batteries 2450mAH 4 Pack
  
doug smile

If the spec of these batteries are to be believed then on a full charge they should give 2 days detecting? I think the current draw of the QED is about 400mAH?
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« Reply #7 on: Tuesday December 27 2016 14:15:02 AEDT PM »

I work on an average of 450mA.
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« Reply #8 on: Wednesday December 28 2016 07:25:18 AEDT AM »

Some battery / charger pricing for comparison purposes.

  

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« Reply #9 on: Wednesday December 28 2016 07:39:54 AEDT AM »

A link to protected 18650 cells.

  
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« Reply #10 on: Wednesday December 28 2016 09:09:56 AEDT AM »

The attached pics show the NiMH solution.
2 layers of 6 cells in series, each bank with its own protective fuse.
9 - 10 hours of detecting time using ALDI "AA"s
Alternatively, a triple pack of Li Ion can be installed with a detection time of up to 21 hours using 3250mAH cells.

If required, additional "things" can be fastened to the outside eg external speaker as shown.
The side can be swapped to suit left handers.


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* 20161227_074433.jpg (621.03 KB, 2048x1152 - viewed 403 times.)
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« Reply #11 on: Wednesday December 28 2016 10:38:32 AEDT AM »

The Grunt box.
Slightly bigger and can hold up to 12 * 18650 Li Ion batteries in 2 layers separately fused for safety.
If the cells are 3250mAH - over 40 hours of detection time.
It will also work with only 1 cell on each layer.


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bugwhiskers
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« Reply #12 on: Wednesday December 28 2016 10:46:57 AEDT AM »

Pic showing box size comparison.


* 20161228_104258.jpg (518.35 KB, 2048x1152 - viewed 381 times.)
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redcaveman
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« Reply #13 on: Wednesday December 28 2016 11:10:54 AEDT AM »

nice job  happy face
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bugwhiskers
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« Reply #14 on: Wednesday December 28 2016 15:53:13 AEDT PM »

Seeing double.

The dual layer 9 - 10 hour detecting time inexpensive & safe solution.
The fuse clip can just be seen at far left.
To change batteries:
Remove 4 wing nuts (no tools required)
Remove lid.
Slide green connector away from it's partner.
Lift pack out. (tipping upside down works well)
Replace the 12 batteries.



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« Reply #15 on: Wednesday December 28 2016 15:58:38 AEDT PM »

The ebay link to the external speaker.
It contains 3 AAA batteries and runs for around 15 hours.


  
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« Reply #16 on: Friday December 30 2016 09:06:10 AEDT AM »

A very good article on charging Li Ion batteries.

  
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australian electronic gold prospecting forum.com  |  Pi metal detector by Bugwhiskers  |  QED Detector ,latest updates  |  Topic: QED powering « previous next »
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