Eagle Cuda 250 from the Brown Truck

Just received my Cuda 250 via the UPS truck today.   So far I like the units simplicity in just the way it is put together.  The mount and wiring couldn't be any simpler than this.  One plug to pop into the back of the unit, and your in business. My other boat has a Lowrance LMS-337 that is kind of a pain to put in and take out of the boat with 3 plugs, and two knobs to dink with.  From what "Coosbayyaker" tells me, it does pretty good on 10 rechargeable AA batteries.  That's a plus! 

Looks like it will mount pretty nicely in the sonar hole in my soon to receive Trident 13 Angler that "Alkasazi" hooked me up with.  Paid in full (for the yak itself, still need to purchase the paddle, and PFD), I'm just waiting for it arrive at their store, so I can go pick it up! 

Just received my Cuda 250 via the UPS truck today.   So far I like the units simplicity in just the way it is put together.  The mount and wiring couldn't be any simpler than this.  One plug to pop into the back of the unit, and your in business. My other boat has a Lowrance LMS-337 that is kind of a pain to put in and take out of the boat with 3 plugs, and two knobs to dink with.  From what "Coosbayyaker" tells me, it does pretty good on 10 rechargeable AA batteries.  That's a plus! 

 

Oh yea, i forgot, you can actually use 12, or even 14 AA rechargable batteries because the cuda accepts 10-17 volts.

14 rechargables at 1.2 volts each is 16.8 volts and will last alot longer the 10 obviously.

*NOTE: DO NOT use 12-14 regular alkaline non-rechargable because they are 1.5 volts each and will be over 17 volts!

   Good tip!

Thanks bro!

I think I'm going to go with the Eagle Cuda 250 as well... Put my birthday money to good use. 
Gps + ff + tides 

now im confused on my battery theory

i was under the impression that adding more batteries in series does not extend the discharge time because in series batteries are subjected to the full load and not splitting the load between batteries....therefore if you have a set of 14 batteries in series at 16.8 volts they would still have a total amp hour rating of 2500mA or watever the particular battery rating you have is....then your discharge time would be roughly 10 hours based on a 250mAH current draw (just pulled that number out of the blue don't know if it is the cudas draw rate or not)


im just trying to get my battery theory correct...can anybody help?

only way i could see it lasting longer is because you are getting more voltage it would take longer to drop voltages below the finders abilities....but that doesn't seem like it would work if you current capacity is going down....im thoroughly confused now lol

try here;
http://www.educypedia.be/electronics/javabasic.htm

here;
http://www.educypedia.be/electronics/circuitssupplies.htm

here;
http://www.educypedia.be/electronics/circuitssmps.htm

and here just for good measure.
http://www.autoshop101.com/forms/elec11.pdf

basically, just look up battery circuit theory on the web and you'll find tons of stuff

Insayn, does that mean you fond the right yak??

now im confused on my battery theory

i was under the impression that adding more batteries in series does not extend the discharge time because in series batteries are subjected to the full load and not splitting the load between batteries....therefore if you have a set of 14 batteries in series at 16.8 volts they would still have a total amp hour rating of 2500mA or watever the particular battery rating you have is....then your discharge time would be roughly 10 hours based on a 250mAH current draw (just pulled that number out of the blue don't know if it is the cudas draw rate or not)


im just trying to get my battery theory correct...can anybody help?

only way i could see it lasting longer is because you are getting more voltage it would take longer to drop voltages below the finders abilities....but that doesn't seem like it would work if you current capacity is going down....im thoroughly confused now lol

I try to never to complicate my theories with mathematics... .

But, i've yet to use the backlight, so the draw is only 170 ma. I get way more then ten hours from 6 2000 mah and 4 2100mah batteries.

As far as the draw, good question, i'm sure someone knows. I'm going on my assumption that it will last longer

now i do know one thing it is not a very good idea to use batteries with different capacities in series


as for the 10 hours i was just basing that on a 250mA draw and didn't mean for it to coincide with any particular finder...just for math purposes

as for the length of discharge of a series of batteries with a given amperage draw...i haven't figured it out yet....all the theories say that capacity does not add in series so if your battery has 2500mAH that is what 10 of them have...but Amp Hour ratings are weird things anyways so im not sure if this theory is related to maximum current draw the batteries can withstand or actual amp hours they have....now im confused again lol

i think i am just gonna stick with a maintenance free sealed 12 volt battery...not really cause i think its better just cause i think for 1 its easier to recharge and 2 i alrdy have one hehe...actually i will probably buy a new one but i at least i have a charger

Insayn, does that mean you fond the right yak??

By finding the right yak, then I would say that is a "yes' for me.   I know I was all over the place in the beginning and had no idea as to what a yak was a month or so ago.  Lots of research, comments, ratings, live visuals, and even a test paddle, I feel I am going the right direction by purchasing the OK Trident 13 Angler. 

Now I just have to twiddle my fingers till it gets delivered to Outdoorplay, where I can go pick it up.  Whoohoo! 

 

All right!!!   Let's talk batteries!!!

So without referencing a particular battery because all batteries are different, I'll just explain some basics of batties in more general terms.  Let's say you had a 1.2V, 2000 mAH battery.  What does that mean?  It means if you are drawing 2000 mA (or 2A as that may be) you'll get 1 hour of battery life above a certain threshold.  That threshold can be different for various battery applications.  I'm not sure how the disposable AA's define it.  Let's say that it is 1.0V for the sake of this discussion.  So after 1 hour of drawing 2A your battery will measure 1.0V.  Most batteries have a knee in the curve after which they discharge rather quickly.  So after 15 minutes more of drawing 2A, your battery may be down to 0.7V, which is a higher drop (0.3V) than it dropped in the first hour (0.2V).

For the purpose of this discussion, let's just say your fishfinder runs down to 10V and draws 2A.  Let's say you have 10 of these batteries in series, for a total of 12V.  After 1 hour at 2A your battery pack drops to 10V total and your fishfinder stops running

Now let's say you have 14 batteries in series for a total of 16.8V.  After 1 hour at 2A your battery pack is now at 14V.  Hah!  Your fishfinder will still run.  In fact, you may almost get another 15 minutes out of it since 14 batteries at 0.7V is 9.8V, just below where your fishfinder stops running.

Note just because you have 1.4X more batteries (14 instead of 10) doesn't mean you can run 1.4X as long.  But you do run longer.

-Allen

All right!!!   Let's talk batteries!!!

So without referencing a particular battery because all batteries are different, I'll just explain some basics of batties in more general terms.  Let's say you had a 1.2V, 2000 mAH battery.  What does that mean?  It means if you are drawing 2000 mA (or 2A as that may be) you'll get 1 hour of battery life above a certain threshold.  That threshold can be different for various battery applications.  I'm not sure how the disposable AA's define it.  Let's say that it is 1.0V for the sake of this discussion.  So after 1 hour of drawing 2A you're battery will measure 1.0V.  Most batteries have a knee in the curve after which they discharge rather quickly.  So after 15 minutes more of drawing 2A, your battery may be down to 0.7V, which is a higher drop (0.3V) that it dropped in the first hour (0.2V).

For the purpose of this discussion, let's just say your fishfinder runs down to 10V and draws 2A.  Let's say you have 10 of these batteries in series, for a total of 12V.  After 1 hour at 2A your battery pack drops to 10V total and your fishfinder stops running

Now let's say you have 14 batteries in series for a total of 16.8V.  After 1 hour at 2A your battery pack is now at 14V.  Hah!  Your fishfinder will still run.  In fact, you may almost get another 15 minutes out of it since 14 batteries at 0.7V is 9.8V, just below where your fishfinder stops running.

Note just because you have 1.4X more batteries (14 instead of 10) doesn't mean you can run 1.4X as long.  But you do run longer.

-Allen

 
So that must be what it's like when I start talking fish biology to everyone.

All right!!!   Let's talk batteries!!!


-Allen

Great explaination Pole!

Don't worry Brian, some of enjoy listening to others geek out on thier specialties.

I was just kidding,  I actually have a decent grasp on the whole battery thing.  It was just nice to see someone else geeking out.

For those of you who have the gang of AA batteries, is there any particualr advantage to that solution, vs a 12V 4 or 7 am/hr single sealed battery???