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Battery Advice (17 posts / 386 views)
MrGreen
Posts: 208
#1 15 Sep 2026 12:22
0
I’m looking at purchasing a Haswing Protruar 1HP outboard and would appreciate some advice on the following:

1. Which battery and size?
2. Which battery box?
3. Can I run a fish finder off the battery or should I get a separate one?

Not bothered about the price, just after the best quality.
nexus6
Posts: 172
#2 16 Sep 2026 03:02
2
Ecoworthy 100A Lithium - there are always deals on, shop around and you can normally buy for around £130ish
Bison Battery box or similar about £40
I run my Lowrance echo off of the cigarette lighter socket on the battery box - no interference.
I also put an Anderson connector on my engine and the battery box. Nice neat connection, no clamps.
framey framey
Posts: 5,316
#3 16 Sep 2026 07:05
0
In reply to Post #2
Never seen them that cheap usually around 200
I want a couple my self
djstrauss281 djstrauss281
Posts: 921
#4 16 Sep 2026 08:01
3
Using the same battery for motor and sonar can input interference to your sonar. You will defo see static dirt on your screen to some effect (even though could be minor). If you can afford to split I would.

I have an Ecoworthy LifePO4 150ah for motor which easily lasts a week without charging on big open waters in France and a Ecoworthy 30ah LifePO4 for sonar which then also aids as a back up if needed. 100ah would be sufficient in all honesty especially if you have access to an Solar Panel on top.

As for boxes because of the size of the 150ah I couldnt find one to fit and they were silly money for a cheap box with electrics so made my own as below pictures (Bought the biggest ready made box I could find similar to the bison one which half fitted my 150 but lid couldnt close properly and the handle broke on day one due to the weight. Cost £70 which was a joke for what you get). My home made box works just as well, houses both batteries and easy to transport. Didnt really need the dividers inside as the batteries are heavy but once an idea pops into my head theres not stopping it.

Trakker box L (anyone will do the Ridgemonkey ones are good too and cheaper) fitted with an IP rated USB and 12V hub bought from Amazon for £15 for electric pump and emergency USB support charging. Also installed a Anderson dual plug on the side which was £6 from Amazon and fitted it to my sonar (my motor already had one). Easy to connect/disconnect and with latch water tight. The USB hub fitted to my 30ah which also aids in the voltage meter to see battery charge. My main 150ah is bluetooth so can follow it from my phone.











nexus6
Posts: 172
#5 16 Sep 2026 21:18
1
In reply to Post #3
I’ve just typed eco-worthy 100a into google and popped up £145 in stock. I’m sure you could find cheaper………….
framey framey
Posts: 5,316
#6 16 Sep 2026 22:27
0
In reply to Post #5
Your Google must be different to mine lol
Closest is Ali express.
Isnt Ali express like wish ??
The_Andyman The_Andyman
Posts: 11,320
#7 16 Sep 2026 22:52
1
In reply to Post #6
Dc house are supposedly the same batteries as eco worthy, £146 currently but withe the right ebay code they do get down to around 130

LINKY POO™ https://www.ebay.co.uk/itm/315166409973
nexus6
Posts: 172
#8 17 Sep 2026 07:03
0
In reply to Post #6
https://ebay.io/m/mlmWFm

£134 found it in about 5 seconds!
The_Andyman The_Andyman
Posts: 11,320
#9 17 Sep 2026 12:54
0
In reply to Post #8
Your link LINKY POO™ https://ebay.io/m/mlmWFm

I ignored this one as it's second hand and may be missing bits, opened to test but is now selling with collection only
nexus6
Posts: 172
#10 17 Sep 2026 14:38
0
In reply to Post #9
soz - didn't look at the details!!
Even at £170 they are good value - there's a tear down on Youtube and it was the same internals as Fogstar. I bought three and they have been faultless.
Keep an eye on the Eco-Worthy site as they often have offers on..........I think I bought mine via Amazon.
framey framey
Posts: 5,316
#11 17 Sep 2026 14:59
1
In reply to Post #10
I have a one in the basket on the eco worthy site along with a charger.
Don’t want to hit the buy button unless I can find a genuine product cheaper elsewhere.
Problem with some of the cheaper ones is making sure they are genuine. 2nd hand how shagged are they etc…
Happy to pay full market if I need to.

Will also look at the other one mentioned 👍
framey framey
Posts: 5,316
#12 17 Sep 2026 15:01
0
In reply to Post #9
👍 thanks but based down south
Would have been ok a couple of weeks ago as in Leeds haha
The_Andyman The_Andyman
Posts: 11,320
#13 17 Sep 2026 15:06
2
In reply to Post #11
If you can wait a little then youll prob get the battery around 130 ish on the next ebay code event and that would be manufacturer selling
framey framey
Posts: 5,316
#14 17 Sep 2026 15:13
0
In reply to Post #13
Got a couple sitting in the basket
Will wait and see what discount offer they come up with after a couple of hours….
The_Andyman The_Andyman
Posts: 11,320
#15 17 Sep 2026 15:18
1
In reply to Post #14
Amazon are £20 a battery cheaper currently for ecoworthy 12v 100ah
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