By Sting Ray
I am curious as what response it would give a different depths and if the chain is laid out straight.
By Cabo Chris
Hoping I got on the list for an AQ Limited as I inquired with Rick. If not I can wait for the final production. Perhaps some of you PI guys can chime in. Obviously the Impulse depths on gold rings is fantastic and like many here can envision the potential. I do not know how the FCC regulates detectors, but was wondering about the early Whites TDI Pro. I'm told by someone very knowledgeable the TDI Pro hits gold rings 20 inches easy. Whatever the depth it's impressive. I do not know why Whites stopped TDI Pro production- perhaps design Rights? Then Whites produced the SL and later the TDI BeachHunter, neither of which have the power of the TDI Pro. My friend says not even close. I currently have a TDI BH. So why did the raw power of the TDI Pro go away? Did FCC regulation require watering down? Or again to do with design Rights? I'm asking because does the AQ Limited being so powerful meet FCC regulations? Might actual production units be a bit less powerful? I suppose not, but perhaps I should cross my fingers I make the Limited list? There was a time I wanted a TDI Pro for deep gold rings and couldn't get one and ended up with the less powerful/still fun TDI BH.
I hope this topic hasn't already been covered and I'm not writing it in the wrong place.
Recently, based on my lack of knowledge in this sector, I have however noticed large differences in actual life, not only because of battery chemistry ...
I mean something about the use of power itself in using the tool.
Thinking of a mobile phone, the standby time is merely relative to the battery capacity, as is the duration in call or video call, much less long ...
So every time a detector is used in an area where there are several signals and we are busy digging or at least hearing many of them, the battery duration is more affected and reduced...
This for me, as an inexperienced, means not being able to have a clear measure of the actual duration of the battery pack ... You can never know regardless of how many signals will pass below the coil ...
So I then discovered the natural drop in voltage, added to that of absorption in the most arduous use ...
And what about threshold instability and false signals if, for example, a pulse is not properly regulated and a too low delay makes it continuously sound for nothing by activating the retuning?
At this point I have the impression that even with higher capacities, the voltage drop is the most difficult factor to defeat, even before the capacity ....
I am facing the insertion of bms modules in these days and in the future I could add step up or step down modules if necessary, but first I would like to understand to what extent it is possible to delay the cut off, if not eliminating some form of protection that these boards cut away leaving a lot of useful voltage.
Unprotected batteries can have a bad end if it is lithium, so there is a compromise between safety and durability ...
I repeat again ... I am not an expert and anyone who can add his knowledge on the subject, do it without brakes because I am well open to constructive technical comments, or even comic and bad ...
By Steve Herschbach
I pitched a royal fit to get a spare battery with my AQ Ltd, and it helped get an official retail price formulated, which I gladly paid. Fisher Impulse AQ Limited spare NiMH battery, part# PI-BATPK-NIMH $199.00
Fisher Impulse AQ NiMH battery
Fisher Impulse AQ NiMH battery
By Steve Herschbach
Click or double click any photos in this article for high resolution versions.
I bought this 4 x 26650 battery holder on eBay after quite a bit of Google work. They are a surprisingly rare item. It comes with sleeves that can use 4 x 18650 batteries also. It ran me $29.65 delivered including shipping and tax. I ordered it on June 25th and it arrived from China on July 14th. The holder delivers 16.8V via a DC adapter plug or 5V via a USB outlet. It has a thin oring on the lid for an IP67 seal.
I also ordered an IP67 M8 4 pole 16.4 foot female to pigtail cable from Automation Direct for $10.50 plus shipping and tax. I ordered several different cables so lets add $5.00 for s&h for this one cable. They delivered next day!
And finally 4ea EBL 26650 batteries from Walmart for $20.99 free shipping, delivered in a few days.
Total parts cost about $70. I have a 26650 charger already that came with my Tarsacci so you'd have to figure that. Some sets of the batteries come with a charger. By the way, the EBL seem in short supply lately.
I shortened the power cable to 5 feet, more than enough to set the detector on ground if need be. The DC adapter that comes with this battery box is great. Blue wire to negative post and brown wire to positive. Warning - I am not vouching for the polarity. I used a multimeter to check my AQ battery and matched that. You should do the same. I take no responsibility for anyone doing this mod and blowing their AQ! The black and white are headphone wires. I hooked up a 1/4" female jack to those.
I am using the AQ mostly as a wader unit employing some true chest high waders that have a big pocket on the inside front. I'll drop this battery in that pocket and plug my Sun Ray Pro Gold headphones in. I could use my TaoTronics to go wireless, but that seems pointless the way the battery is mounted near my head. I need to determine run time with four 26650 batteries - should be way better than the current 3 (all metal) to 3.5 (tones/mute) hours running time I get with the Fisher battery. Enough that I probably will not need to do a battery change at all and perhaps enough for a long day. I also need to determine how the detector handles without a battery under the elbow. Lighter of course, but too nose heavy? Should be fine in the water as the coil is neutral. Maybe too nose heavy for some people for dry beach use. We will see. This would be a great belt hip mount battery for dry beach use. I suppose it could also be mounted under the elbow, perhaps with the included strap, so I'll consider that also. It would balance well like that. It is IP67 rated and with proper headphone / power cables might be good enough to use under arm for wading / shallow dunking use at least.
Operating sequence. Power up battery pack (it has its own power switch) then power up detector. Power off detector, power off battery pack. Doing otherwise may trip the circuit protector on the battery pack, necessitating removing and reinstalling the lid to reset. The pack has its own built in battery level indicator. And it may be used to charge a phone or other USB device! I was warned this USB capability might create interference in the AQ, but that has not proved to be an issue so far. The two circuits, 16.8V and 5V, appear to be isolated.
Powered up - and no smoke!
I really like this. Very easy for a not super skilled person like me to do, less than third the cost of a spare AQ battery, and should get well over twice the run time. If I had another complete set of batteries ready, it would be an easy swap for even more running time. It leaves only one cable to the rear end of the detector, and that is my only concern at all - I will try and beef that up and protect it better. I'm thinking a rubber boot that clamps completely over the end of the detector rod. I ordered a couple like like the one pictured below to see if it will stretch enough to work. Long story short is there is a very good chance this will replace my Fisher batteries for most of my use. This is why I had no problem getting the Limited "wader version" of the AQ as I find chest waders to be a good option at Tahoe and it's cold water for all but a couple months of the season when the water gets reasonably warm for mask and snorkel work. I used to do a lot of ice diving with drysuits while gold dredging, but am not looking to get quite that serious any more.
Joe’s Fully Waterproof 26650 Alternative
100% brand new and high quality.
Without 18650 battery. You need to prepare 4x 18650 or 26650 batteries yourself to use.
DC 5.5x2.1mm interface has input and output functions, with DC adapter, easy to use.
DC 5.5x2.1mm port for 16.8V devices
USB 5V Port for Charging Smart phone GPS Tablet PC or 5V LED Light and more.
Improve replacement battery pack fixes inconvenient shortcomings, greatly facilitates the users of the battery pack DIY requirements, without spot welding battery, thereby greatly reducing the battery internal resistance, improve the battery discharge performance, so as to effectively improve battery life
Power supply: you can use 18650 rechargeable lithium battery as a power source
The output side: USB and DC dual output power supply function,DC output voltage is 16.8V(can power the 16.8V device, such as the bike light), USB output voltage is 5V(can power the cellphone and other 5V device), to meet a wider usage scenarios, the product comes with overcharge and over discharge protection, protection of the battery is more safe and sustainable
Color: Black or Red
Input Voltage:DC 16.8V
Output Voltage: DC Port 16.8V
Standby current Under 80μA
USB Output Voltage: DC 5V
USB Output Current: 2000mA
Overcharge Protection Voltage: 16.8V
Over Dischage Protection Voltage: 10V
Over Current Protection Voltage: 7.2A
Size: 9x6.5 x 6.5cm
Cable length: 29cm
18650 and 26650 Batteries are not Included
Please put in battery in a right way.
Charge it when power indicator light flashes.
Don't use the device in the water. Waterproof standard is IP67
1x Waterproof 4x 18650 /26650 battery box case.(without battery )
1x 5.5x2.1mm adapter
4x 18650 to 26650 battery converter