voltage/current

[markg]

I remember reading a post on this forum some time back where the depth of the SL was more dependent on battery voltage. That been said, can I assume maximum depth can be obtained by using high quality alkaline batteries over the rechargeable pack?
Then if you using the rechargeable pack you should change out the pack more often. Is this thinking correct?

 

[Reg]

The simple answer to both your questions is yes.

Reg

 

[Frank-S]

I agree with Reg,I have a new SL made in 2014 sold as new.
serial number ends 80 BC.It has poor dept with stock batterys
10.40 volts rechage-able batterys,With AA battery pack 13 volts my
SL gets 2 more inch in dept. as battery volts go down dept goes
down.White battery pack just dont have enouph amps to feed the
SL. The SL needs a battery with more volts and amps.White is useing
VLF battery pack for a PI that needs more power.The SL controal box
needs to be made so that it will take 2, 8 AA battery packs back to
back togeter at 13 volts more amps and a larger recharge able battery
at 15 to 16 volts with more amp power to last longer.
This will increase dept and give more user time.
If you are thinking about getting a SL dont get one that serial number
in BC,It has other problems, white needs to re-call all SL that serial
number ends in BC.Its a good idea to ask dealer or owner before you
get one to ask for field test,as to what you are looking for coins or
prospecting.
Frank -s

 

[markg]

I can see it could be very expensive to change batteries every two hours.

 

[Reg]

The RNB Li Ion battery system is a very good compromise. It uses 3 Panasonic cells rated at 3100ma which is good for maybe 4 hours plus. It would run longer but changing it sooner keeps the maximum depth. This setup can last for years if used properly. Stopping the charge at 4.0v increases the life span dramatically with little time loss of operation.

Reid makes a 4 cell setup making it closer in voltage to the TDI. It should run about the same time since he uses Panasonic 3400mah batteries.

The NiMh batteries sold with the unit give very respectable depth and maybe 4 hours run time before they start losing more depth than one should allow.

Others will tell you they can run for much longer but fail to take into account the negative down side, which most owners probably don't realize is happening.

Reg

 

[markg]

So it would be wise to only run the stock batteries a couple hours then change out for a charged pack, correct?
Or should I change out every hour?

Well the reason I'm asking, I'm going to the beach and want to use the SL, but need all the depth I can get.

Thanks for your time

 

[Frank-S]

markg, Do a air test with your SL, with a US nickel or a gold band you might have a good
SL.If the 12'' coil detects a nickel at 15'' or better its ok.
If you have a 8 AA battery pack,give it a air test, leave the SL on to see how long it last.
If there is a Dollar store near you, 8 AA packs are a dollar each,get 4 packs that 4 hours use.
What do you think about White selling TDI, SL that you have to purchase super batterys to get
good results when you use it,
Do you feel Riped off.
What coast are you detecting.
Frank-s

 

[markg]

Thanks I'll do the air test and see.
East coast. Never had a PI to use before now. Really looking forward to it.

 

[Mr.Bill]

The original version that was shown to Whites used a 14.7 volt battery pack. That pack was a rechargeable one.

Mr. Bill

 

[Mega]

The TDI sl version has the abilty as i understand it to use the RNB battery packs which are not only lighter than the Whites ones but also have much much longer staying power especially the 3100 version,so in theory it could seem bad but by using the RNB option that address's the power problem.I use the same battery pack in my DFX albeit one is a VLF and the sl is a PI machine but it still gives a massive amount of extra detecting time which is what we are all after.And no i dont have any connections with this comapny just highlighting what could be a answer to the original question.

 

[Jim in Idaho]

The TDI sl version has the abilty as i understand it to use the RNB battery packs which are not only lighter than the Whites ones but also have much much longer staying power especially the 3100 version,so in theory it could seem bad but by using the RNB option that address's the power problem.I use the same battery pack in my DFX albeit one is a VLF and the sl is a PI machine but it still gives a massive amount of extra detecting time which is what we are all after.And no i dont have any connections with this comapny just highlighting what could be a answer to the original question.

I use the RNB pack in my GMT, but the best battery for the TDI S/L is the "Reidman" 4 cell Li-ion pack. it's 16.8 volts, whioch delivers the same power as the standard TDI pack. Reidman uses the 3400 MAH cells, so lots of full-power detecting time with full depth. Price is about the same.
Jim

 

[Frank-S]

Thanks Mr BILL.
Do you have a copy of the schematic of the original verson of the TDI that was shown
to White before Eric sold it to White..
If I rember right you modifyed a PI that Fisher was makeing,it was a good PI the battrys
last for ever.
Frank.

 

[markg]

Been using AA batteries and they give a combined voltage of 13.20 volts over the rechargable pack. Reg is correct in one of his post, as you continue to discharge the standard battery back you are loosing depth and don't even know it. So to remedy that I change every 2 hours and use regular AA batteries too. All in all I'm very happy with the performance at the beach, I get enough depth for now. I met a guy at the beach who had a Minelab 5000. An amazing machine. He dug a hole, maybe 20" deep and 3 feet across for a crushed beer can. I'm not very interested in that kind of labor.
I'm happy with what my SL does.

 

[Mr.Bill]

Sorry Frank, I do not have one. I don't even remember having one.

Mr. Bill

 

[Frank-S]

markg. You are right max depth is dependent on battery voltage for SL max depth on targets.
You left out battery amps, more battery amps gives more user time.Max voltage with low amps
gives good depth and poor user time.
Think about this as you use the SL with a full charged battery that will fit in the SL battery box no matter
what the voltage as you use the SL in a short time voltage dropes you lose max depth.You will miss targets.
If you are prospecting that is very diss-appointing.
In one of your post you said that you were very pleased with your SL, you found some coins and a gold ring,
if there was another gold ring a few feet away and you missed it, becased of voltage drop will you still be pleased
with your SL or disappointed with White battery design.
Its a easy fix all White needs to do is change design of controal box and battery box, put in a battery with max
voltage and more battery amps.Results good depth and more user time.
Frank.