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9-Volt Battery Powered Detectors

B

berryman

New member
I came across a post recently where the poster said that he'd never use a detector powered with a single 9-volt battery. This is the third or fourth time I've read a post like this. Unfortunately, none of the posters explained why they believed the 9-volt powered machines were somehow less desirable.

Is this simply a battery cost issue or are 9-volt powerered machines less efficient/less capable than those powered with rechargeable battery packs or multiple AA batteries? If the latter, why might that be the case?
 
My guess is the people who make statements like that either have a 9 volt phobia or they are not well educated.......:rofl:

Most of the Tesoro detectors run with a single 9 volt battery and they work just fine. If you want a detector with more power or longer running time, the larger battery packs come in handy but some people don't like the extra weight of more batteries.
 
Detectors that use 9 volt batteries have ciruitry that is designed to use the 9 volt battery. Not a good thing or bad thing particularly, just a different animal. Personally, one of the things I like about my Tesoros is the fact that they use just ONE battery.
BB
 
My Omega runs for EVER (well a very long time) on one 9 Volt battery, at lest as long as my old Teknetics 9000/B would run on 14 AA batteries.

Old School detectors that used to run on 14 AA batteries are gone. The more modern, compact electronics are much less POWER driven then in the early days, or to say the modern electronics are much more efficient than in the past.

A good number of the double 9 Volt units actually runs at 5 volts and the two 9 volt batteries are wired in parallel to each other and not in series. The paralleled 9 volts just means the capacity of current is doubled but the voltage stays the same.
When I got my Omega I thought that the single 9 Volt battery would be a problem and that I would always be changing batteries, that just isn't true, it works very well and I can get an easy LONG day of hunting out of the single battery.

Mark
 
I think someone is all wet. Them high dollar detectors need a LOT of power to run them T V screens. I love my TESOROS. One 9 volt battery that last for many, many hours and will do just about as good as the high dollar units. I like the light weight. I am getting older and so is my arms. I eill stick to 9 volts.... KEN
 
I think Ken's right - the screens etc. are bound to need more power. In fact the Tesoro Cortes and the DeLeon both use 8 AAs to power the screens. However, in my experience, the battery life is quite good when using headphones, but 8 batteries versus 1 does make a diffference in cost and weight.
BB
 
Recently acquired the :teknetics: Euro Pro runs forever on one nine volt and
very light, a swinger for an all day hunt. Its a keeper.:thumbup:
 
My Tesoro Silver umax uses one of them nine volt batteries and using headphones I easily get 30+ probably over 40 hours on that one battery. Like Ken said them Tesoro's don't run a big TV screen and don't draw as much current. At work a few years ago I had to make a circuit that would alarm when a 9 volt battery went low. In my test circuit I hooked up 4 LEDS drawing 20 milliamps each for a total of 80mA and it took forever to drain the 9 volt. I was amazed at how long it took as it was way longer than I had calculated and the fail/alarm voltage I had set was not that low. (I don't recall excactly what the setpoint was) What really amazed me was that since I needed to see it alarm I would have to shut the test circuit down every night before I left and when I restarted it in the morning the 9 volt battery had rejuvinated some and it took several hours just to get back to the voltage I was at before I shut it down the previous night. This was just a no name hardware store akaline.

I think that from earlier detector days some people tie the thought of more battery voltage and capacity to higher transmit power. There are plenty of manufacturers out there using a 9 volt battery that have great depth and long run time. I say myth.
 
Many detectors have the voltage used stepped down to 7 or 8 volts so anything above that is O.K. A T2 uses four AA's so six volts, not even nine, and will run for forty hours. The "Splice" mine detector just used a fraction of a volt provided by its pendulum charging system that uses the motion of your swing.

James Gifford of Tesoro published an article saying why at that time (big box Gold Sabre, Eldorado etc) he had decided to use packs of AA's. Purely because with a pack of AA's you could through a single battery away if failing and replace with another at little cost. When he decided to go super light/small he switched to PP3's.

Bit different if you have a machine that can put 44, even 120 volts through the coil. These need to have the batteries to provide the power and maintain a reasonable running time.
 
What I like about AA batteries is that LSD rechargables are widely available in AA size.. They work great in my detector and using them saves a lot of money over time compared to alkalines. AAs are used in a lot more applications than 9V, so the initial higher cost of rechargables is quickly recouped compared to 9Vs which aren't used nearly as much.
 
So I wonder why my Tejon uses 8 AA batteries, it has no screen? The F75Ltd I had only used 4 AA batteries and it had a screen and a light that stayed on all the time the machine was on.

Ron in WV
 
Here's a thought. If the transmitter for my garage door opener, which uses one 9 volt battery, can transmit 200ft. and activate the door opener, why would a detector like a screen less Tesoro need more than 9 volts to transmit a couple of feet?

Even my F5 with its elaborate VDI screen will run on one 9 volt battery, albeit I would assume for a shorter time.

It
 
n/t
 
My 1021 cz takes two 9 volters....analog. F-75 takes 4 AA and lasts twice as long, ....digital. ?????
 
That's just about all incorrect. Transmitting power is not regulated. Many low cost detectors have a greater power output than more expensive ones but extra power does not relate to a great degree to increased performance ie double the power through the coil does not mean twice the depth, just a fraction more.

The analogy of a garage door confuses transmit distance through air in a blip of power for a split second with a detector that's operating none stop for several hours or more with a large circuit board/cable/coil that's leaking current through inefficiency and heat generation. Every target the detectors coil passes over ie a target enters its electromagnetic field around the coil, the fields shape is distorted and a percentage of the fields energy is converted to heat. The detectors battery/batteries have to maintain the detecting field and do many other jobs at the same time, then when the target is located, provide further bursts of power to the headphones.
 
As you can tell by our posts, we're all electronics wizards here. We'll throw out some speculation till someone comes along and corrects us.
 
Steve O said:
As you can tell by our posts, we're all electronics wizards here. We'll throw out some speculation till someone comes along and corrects us.
Click to expand...

Hmmm? Looks like I only rated a Mostly Bull. :rage:

That's not bad considering how little I actually knew about the subject. :beers:

HH:wave:
 
When it's all said and done, if YOU like it, Use it. Regardless of which batteries.
BB
 
Hi,
I don
 
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