12V Battery

[Anonymous]

If I now replace my SD's standard 6v10ah battery with a 12v10ah battery system would I now double my operating time before the need to recharge due to the power of the 6v of 60 watts being doubled to 120 watts with the 12v?
My SD with the 6v currently draws 600 mA giving 16 hrs of operation.
Toni.

 

[Anonymous]

Hello Toni,
I have been using the 12 volt system on my 2100 for a year or so now and could go a full day without needing to charge the 7 amp hour battery that came with the unit.
I have since switched to a 4.5 amp hour Intrestate battery and still have no trouble hunting all day. I carry two just in case and if I will be a long way from the truck I switch at lunch break to assure having plenty of juice.
Take care...Bill S.

 

[Anonymous]

Hi Toni,
The way I read your post is that you are asking if you can swap the 6V battery directly to a 12V battery. If this is what you intended, then the SD would not work at all and would likely be permanently damaged. If it draws 600mA at 6V then the current will much about double at 12V, that is, until something burns out. To double the operating life, you need to double the battery capacity, not the voltage; so go to a 6V 20Ah battery. I would simply just carry a spare 10Ah.
12V battery systems are available for the SD's, but the 12V must first go to a voltage regulator which drops the voltage to about 7V. This is about the most you want to safely apply to SD's. Anything above 8.5V and the detector just cuts out. Not sure why but I don't intend to experiment in that area. The benefit of the 12V plus regulator system is that the detectors is supplied a constant voltage during the life of the battery, so its performance will not change.
Eric.

 

[Anonymous]

Hi Toni,
The purpose of the new 12 volt system from Coiltex is not to increase the current output at the coil but to give you a constant 7.3 volt output for the entire day of hunting. This maintains a constant output for you whereas with the 6 volt system the voltage drops off at a slow but steady rate throughout the day causing a slight loss of power and therefore depth. It's a bit heavier than the 6 volt system but that extra power at the end of the hunting period more than makes up for the weight. And as some of my fellow posters have stated the have gone to a smaller, lighter 12 volt battery to lighten things up a bit. It's really the regulator that is the key to the new system. Take care, RD

 

[Anonymous]

Thanks for all the input.
Eric, I may have miss led you. I understand what you say to increase the operating time by using a larger amp hour battery of the same voltage.
What I mean is by usig the 12v system through the 7v regulator and with the same 10 amp hour rating as the 6v does the 12v setup, with double the wattage, now produce twice the operating time of the 6v system.
Also not sure how many amps the regulator draws as this would probably add to the total draw from the 12v system. Its the double in wattage between the batteries begs my question ?
Eric I hope this explains my enquiry clearer.
Thanks, Toni.

 

[Anonymous]

Hi Toni,
Wattage is power consumption or dissipation. For example, the SD draws 700mA at 7V, therefore it is consuming 4.9W. If the 7V is derived from a regulator whose input is taken from a 12V battery, there has to be 5V dropped across the regulator. The regulator itself only draws a small current, say a couple of mA, so the current drawn off the battery, although 12V, is substantially the same as if it were 7V. As we have 5V across the regulator and 700mA going through it, then the regulator is dissipating 3.5W. That is why it gets warm and has to be mounted on a heat sink. The outcome is, that a 12V 10Ah battery is not going to last any longer than a 6V 10Ah battery. The benefit of the regulator is that the supply to the detector is constant and you can safely add another volt to the TX circuit.
Eric.