Which Battery For a Garmin UHD2 93sv?

[RLinNH]

     As I have mentioned in previous posts on this forum, I apologize for the Newbie questions. I am an old school kayak fisherman that wants to add a chart plotter and maybe a trolling motor to his kayak that is TOTALLY out of the loop these days. I haven't kept up with technology. It has come to light recently that I won't be buying a boat anytime soon. So may as well add the above mentioned items to my Hobie PA14.

 

     As you read above, I have made my mind up as far as the Chart Plotter. I like the UHD2 93sv. I have always been drawn to Garmin when it comes to fish finders. Why change now. I'll be going with the GT-56 for a transducer. With that information, which battery for this Chart Plotter? Also, I would like to add a trolling motor in the future. Would it be as simple as adding another battery? Or should I get a battery big enough for the 2 of them now? I would like to go with a Lithium Battery for the obvious weight savings. As much as I hate recharging lithium batteries with their inherent burning qualities. I'll have to educate myself on today's new battery rechargers and look for the safest option. As always, thanks for looking and I look forward to your answers.

[casts_by_fly]

separate batteries for FF and motor.

 

Will you be adding livescope?

 

LiFePO batteries are not the ones with inherent burning qualities.  LiFePO chemistry is far safer than the lithium batteries you find in small toys and the like.  LiFePO is what most EV cars are moving to.

 

If no livescope, then a 10 aH lithium will probably get it done for you.  Garmin says typical power draw is 1A, max is 1.6A.  If you run the battery down to 10% that's 9 AH, so 5-9 hours on the water.  A 15 AH batter would be safer and isn't much more money.

 

If you're going livescope, then I'd go straight to a 30 AH.

[RLinNH]

1 minute ago, casts_by_fly said:

separate batteries for FF and motor.

 

Will you be adding livescope?

 

LiFePO batteries are not the ones with inherent burning qualities.  LiFePO chemistry is far safer than the lithium batteries you find in small toys and the like.  LiFePO is what most EV cars are moving to.

 

If no livescope, then a 10 aH lithium will probably get it done for you.  Garmin says typical power draw is 1A, max is 1.6A.  If you run the battery down to 10% that's 9 AH, so 5-9 hours on the water.  A 15 AH batter would be safer and isn't much more money.

 

If you're going livescope, then I'd go straight to a 30 AH.

No Live Scope for the Kayak. Saving that for the new boat, someday...🙄  Thank you for the reply. So a 15AH Dakota would fill the bill. How do you go about recharging these LiFePO Batteries?

[MN Fisher]

7 minutes ago, RLinNH said:

How do you go about recharging these LiFePO Batteries?

Get a charger that's rated for Lithium batteries.

First choice would be a NOCO

 

[casts_by_fly]

NoCo Genius.  I'm using a 5 which is suitable for both smaller batteries and larger batteries.  I have a 30 and an 80 in the kayak.  Mine is single bank, so I have to swap the plugs after one charges.

[txchaser]

I'll add that I've been fishing a 7" helix and when mapping is on the 10AH should be just fine, but it isn't. It's just not enough for a long day, so now I have to carry two 10AH. Point being, find someone running that specific unit and see what they are using; you may need to size up vs what the math says. 

 

[RLinNH]

6 hours ago, txchaser said:

I'll add that I've been fishing a 7" helix and when mapping is on the 10AH should be just fine, but it isn't. It's just not enough for a long day, so now I have to carry two 10AH. Point being, find someone running that specific unit and see what they are using; you may need to size up vs what the math says. 

 

I'm buying a Dakota 18AH for the Chart Plotter.

[casts_by_fly]

7 hours ago, txchaser said:

I'll add that I've been fishing a 7" helix and when mapping is on the 10AH should be just fine, but it isn't. It's just not enough for a long day, so now I have to carry two 10AH. Point being, find someone running that specific unit and see what they are using; you may need to size up vs what the math says. 

 

 

I ran a helix 7 for 2 years.  I very quickly learned that a 10 ah lead acid was nowhere even close to enough for me.  I would turn on autochart at the start of the morning and then ran side imaging while fishing.  A helix 7 draws 0.8A max power and with screen brightness on 10 and autoshart running I think that's about all of the things that would pull power.  I would get 4-5 hours of run time every now and then.  6 hours was an average day.  I think the difference was that I'd turn down the brightness in the mornings.  A 10 ah lithium might have gotten there for a full day but would have been close.  An 18AH would be my choice in that scenario now if trying to minimize outlay.  I went with a 30 AH.  (1) It allowed me to fish 2 full days without charging, meaning I could come home late one night, plug in the main battery which would be drained, and be good to fish in the morning without having to switch plugs.  (2) I figured I'd upgrade in the future which I did.  A 30 AH is now how much I need for a full day.

[GerGa]

On 12/5/2023 at 3:04 PM, casts_by_fly said:

separate batteries for FF and motor.

 

Will you be adding livescope?

 

LiFePO batteries are not the ones with inherent burning qualities.  LiFePO chemistry is far safer than the lithium batteries you find in small toys and the like.  LiFePO is what most EV cars are moving to.

 

If no livescope, then a 10 aH lithium will probably get it done for you.  Garmin says typical power draw is 1A, max is 1.6A.  If you run the battery down to 10% that's 9 AH, so 5-9 hours on the water.  A 15 AH batter would be safer and isn't much more money.

 

If you're going livescope, then I'd go straight to a 30 AH.

bumping this thread but Garmin says 1.72A average for UHD2 9".  You might be looking at UHD not UHD2.