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Battery Advice (36 posts / 7,772 views)
Hitman Hitman
Posts: 9,171
Post #2 8 Mar 2021 16:14
0
I've got the rebel cell battery 50aH nice and light

I use it for my boat but also use it to charge/power up things when boats are not allowed,I rigged it up inside a storage box with brass bolts sticking out so you can either use crocodile clips,spade ends etc on you devices 👍
Calabro
Posts: 335
Post #3 8 Mar 2021 17:23
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In reply to Post #1
I also have Rebelcells. Lithium comes with a price tag though. And I found out that the current on lifepo's is somewhat unstable, so you'll need some sort of stabilizer when you want to use certain types of depth finders or when you want to charge phones (check rebelcell website). Could be the same with lead batteries though, I'm not sure.
Instructor Instructor
Posts: 68
Post #6 13 Jul 2021 09:14
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In reply to Post #3
For you guys using the Rebelcell, do you think they were worth the investment rather than a lead acid. Comparing the costs, is the investment worth it in the long run ? vs a well managed lead acid ?
Calabro
Posts: 335
Post #7 13 Jul 2021 15:59
0
In reply to Post #6
They both have their advantages. I only use small ones for charging my tablet, depth finder, phones, bivvy lights etc, but can only imagine how nice it would be to have lightweight lipos for my minn kota. That reduced weight is a real plus, and being able to drain your battery without worrying about damaging it too. As far as the bigger ones are concerned: too expensive for me. I really do properly maintain my batteries, so I prefer buying a new lead one every five years, as opposed to spending a ton of money. In the end lithiums die of old age too (loss of performance etc).
TCarper TCarper
Posts: 4,650
Post #8 15 Jul 2021 20:53
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In reply to Post #2
How long do you think that 50aH lithium lasts you on your boat mate? I've heard that as you can discharge a lithium to 95% instead of 50% that you can for a lead acid.... So in theory you can get away with roughly half the size. I've been looking at one of these https://www.amazon.co.uk/ECO-WORTHY-Rechargeable-LiFePO4-Phosphate-Protection/dp/B08XZCHJQG/?

Do you think your 50aH lithium lasts as long as a 100aH lead acid on your boats motor?
TCarper TCarper
Posts: 4,650
Post #9 31 Jul 2021 19:53
0
In reply to Post #8
Purchased one of these today... 75aH. It's being delivered this week. I'm hoping that's going to be the equivalent of a 135-140aH lead acid.

https://www.amazon.co.uk/dp/B084BTDYHR?psc=1&smid=A15P2V7WUMBZKK&ref_=chk_typ_imgToDp
TCarper TCarper
Posts: 4,650
Post #10 4 Aug 2021 18:53
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In reply to Post #9



TCarper TCarper
Posts: 4,650
Post #12 4 Aug 2021 20:36
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In reply to Post #11
It's absolutely incredible Jamie. It's soooo much lighter.

The FunYak wasps are pukka, but it only has a weight limit of 150kg. Me, a 105aH lead acid & motor is okay... But add a ton of bait too and it is pushing it a bit on a gnarly windswept big pit.

The lithium will make things much much better. Can't get over how light it is!!
Elad
Posts: 4,718
Post #13 5 Aug 2021 21:51
0
In reply to Post #12
Let us know how you get on with it.

I've got quite a few 110 lead acids for long French trips but the thought of not hiking them through the mud and killing my back is making my wallet open..
Gashman Gashman
Posts: 562
Post #14 5 Aug 2021 22:27
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I'm thinking about getting a 75ah lead acid to pair with a 40lb motor.

Hoping it'll give me 2-3 hours at low speeds.

Pushing a 230 zodiac dinghy

Am I hoping for to much?
TCarper TCarper
Posts: 4,650
Post #15 6 Aug 2021 10:00
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In reply to Post #13
They have come down a lot in price mate recently. I'm guessing that where you can take lithium safely down to 5-10% at full operating power... (instead of 50% lead acid)... That in reality that 75aH lithium, should last as long on the bank as a 130-140aH lead acid.

Cost me £350 delivered from Amazon with a lithium charger.

I will let you know on here.
TCarper TCarper
Posts: 4,650
Post #16 6 Aug 2021 10:05
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In reply to Post #14
No that will be fine.

TCarper TCarper
Posts: 4,650
Post #17 11 Aug 2021 15:55
1
In reply to Post #13
Elad... It's nothing short of incredible!!

I've just got home from a three night trip. I done three rods, 8 trips back and forth at 550m. 40lb thrust motor on speed 5 (top speed). That's approx 4.4km. Previously I was using a brand new Numax 105aH lead acid. After these 8 trips back and forth, the lead acid would be losing power massively and would need changing.

My Lithium is 75aH. At 100% it reads 13.9v. At 10% it will read 12.4v I just got home and checked it. It is reading 13.3v... After 4.4km of the motor running on speed 5

That's well over 50% of the power still left.

I am absolutely dumbfounded as to how good it is..
Gashman Gashman
Posts: 562
Post #18 11 Aug 2021 20:08
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Not been out on mine yet... need to find somewhere to launch on the kennet.

I know the water your on though, that's a lot of graft even with a boat!
TCarper TCarper
Posts: 4,650
Post #19 11 Aug 2021 21:40
0
You'll be fine mate.
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