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 #33 30 Nov 2021 at 5.27pm | |  |   |
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In reply to Post #28
Hey Mark,
after a bit of advice on how you use the voltage reader. I have just got one, do you just have it as a unit to test occasionally, via croc clips or something, or have you cut it into the battery box and have it hard wired all the time?
Thinking I should be putting it on the battery box and hard wired all the time?
Cheers
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#32 25 Nov 2021 at 12.09pm | | | |
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In reply to Post #31
Ignore me I thought they were life batteries.
Got a 75amp Numax for a backup now.
Cant wait for it all to come 
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#31 25 Nov 2021 at 9.25am | | | |
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In reply to Post #10
Hi guys
I have just bought one of the batteries mentioned in Mark's link
Looking for a backup battery too. Found these
SLK Power Mobility Scooter AGM Battery Pair of 2 x 12v 36ah
https://www.amazon.co.uk/dp/B01M7XE2AC/ref=cm_sw_r_cp_apan_glt_fabc_W2CAY5R01W3Q5S3FQNV0
Would they be ok as backups to the 75ah one?
Newbie alert go easy!!!
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#30 28 Aug 2021 at 4.43pm | | | |
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In reply to Post #28
That's the one I ordered! 
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#29 18 Aug 2021 at 7.39pm | | | |
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In reply to Post #26
Numax are very good mate, Exide are excellent as are Lucas. They are so much cheaper now... Just get a very good branded one. They last much better than the cheaper ones.
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#28 18 Aug 2021 at 7.37pm | | | |
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In reply to Post #27
I have this one Ken, but yes anything will be fine.
https://www.ebay.co.uk/itm/294317835184?_trkparms=aid
It reads from 6v up to 63v batteries. What voltage are your lithium bait boat batteries 6v or 12v? It will read either. You will just have to find out what your bb battery reads voltage wise, at around 25% power left, so you know when you are running low. Have it showing volts, not %... That is useless.
You'll work it out Ken. I'm pretty confident after two trips with my battery that I have it sussed now. I've saved on my phone what my battery reads at approx 15-20% power left.... And then 9% left.
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#27 18 Aug 2021 at 2.06pm | | | |
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In reply to Post #23
I have a lithium voltage meter Ken
Good thinking, Mark. Getting one off Amazon today. There are a couple of cheap ones, but they are only for checking my bait boat batteries. Should be sufficient...Yes?
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#26 16 Aug 2021 at 4.09pm | | | |
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Hi, me and my mate only use a boat for one week a year, we have our own motor, but the lake has just informed us they no longer can supply us with batteries. So we are going to purchase a new one but are not going to go the Lithium route as it is for only one week a year, so can anyone point me in the direction of the best value leisure lead battery please, TIA
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#25 16 Aug 2021 at 8.51am | | | |
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I've had a 100Ah Lithium for a few years now and mainly for use at Rainbow plus few other lakes abroad when using a boat and cannot fault it, used to take a couple of lead acid 110Ah and would be charging one up after 3/4 days alternating the lead acids so 48 kilos replaced by just the one 13 kilo battery, last time at Rainbow for one week it lasted the whole trip and still came home with loads of charge remaining.
To conserve on battery life when I was using the Lead-Acids I have always rowed out to spots for initial feature finding or dropping the rigs only using low speed to hold position whilst baiting, putting in markers , prodding etc... the main use then was for motoring out to play fish or returning to the bank with them at low speed, now with the Lithium the oars stay in the rowlocks tickling about at low speed for most things but flat out to do battle with the fish.
It's the weight that is most pleasing my 50 year old back loves it the most.
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#24 15 Aug 2021 at 8.21pm | | | |
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In reply to Post #21
Just went one up and ordered the 100ah lithium and a 75ah lithium. hoping this should stop the need to carry as many lead acids, if any.
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#23 12 Aug 2021 at 5.08pm | | | |
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In reply to Post #22
I have a lithium voltage meter Ken. I contacted the manufacturers, and they kindly gave me an approximate chart of what the battery will read voltage wise at certain percentages of its draining down. So I don't have to rely on the voltage meters % readings, I have it set to read the current volts.
They told me my battery should read 13.9 -14v when at 100% and at rest. Approx 12.4 volts at 10% power left at rest. I will try not to go down past 10% to prolong its life, even though you can go down to zero without damage. They told me the expected cycle life they give is based on 100% charged & going down to 0%. But by only charging to 90% & taking power down to around 10-20%... They said it will vastly improve the batteries length of life, long past what they actually publicise (2000 cycles) He said by taking care of them I could expect anything up to 10,000 cycles. 
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#22 12 Aug 2021 at 3.24pm | | | |
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The Ultramax are superb batteries, both in the 'proper' boat and in the bait boat. The only thing you be aware of with Lithium batteries is the fact that they do not show any sign when they are running down, and as consequence they will stop dead without any advance warning. OK when afloat as you'll always have oars, but not so funny when the bait boat stops 250m out!
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#21 12 Aug 2021 at 8.51am | | | |
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In reply to Post #20
It really is amazing. I will know more in a couple of weeks... But early indications are the 75aH lithium, is going to last around three times longer than my 105aH lead acid on the bank, doing identical applications.
That's even better than I thought.
The best thing is there is no loss of power at all and it weighs feck all in comparison. I was taking that 105aH Numax, and an Exide 80aH as back up every week. Two hours drive either way. The weight that has taken out of my motor, is incredible.
LHR had already had a bite that morning.
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#20 12 Aug 2021 at 6.14am | | | |
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In reply to Post #17
Nice one, thanks for that.
Couple of my lead acids are a few years old now so am going to get a couple. 2 weeks on Lac Du Der in October so can give them a good test 👍🏻
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#19 11 Aug 2021 at 9.40pm | | | |
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