Battery Flatter Than A Flat Thing
#1
Posted 28 November 2019 - 03:33 pm
#2
Posted 28 November 2019 - 09:06 pm
Hate to say this, but i've heard of enough failed batteries after being left on optimisers to remind me of why I would never use one.
Although lead acid batteries can be kept on trickle charge if the manufacturer designs the battery accordingly, I have never heard of one failing when it's given a regular top up charge merely once a month or so.
I can't say for sure that any particular optimiser is worse or better than another, and I suppose the people who charge monthly don't have an external device which they can write about after finding a possible failed battery, which somehow might have died between the two charges, so they could put it on the internet and state they think it is the optimiser, and not the battery which failed.
It might just be my own experience that I've never had a failed battery when recharged intermittently, does anyone else have similar experience I wonder. I'm curious to know ?
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#4
Posted 28 November 2019 - 09:56 pm
it was a Varta which has been fairly good Yuasa is the best but Proud Virking has a lithium iron phosphate has to be seen to be believed, it's tiny but cranks out the amps. I will be going for a full size one, but they are a bit spendy.
#5
Posted 29 November 2019 - 09:08 am
Use an Optimate every winter. Never had any problems......................so far.......
#6
Posted 29 November 2019 - 11:10 am
Hate to say this, but i've heard of enough failed batteries after being left on optimisers to remind me of why I would never use one.
Ahh a minimate. Lots on here with premature battery fail over the years after minimating.
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#7
Posted 29 November 2019 - 11:30 am
Ahh a minimate. Lots on here with premature battery fail over the years after minimating.
I think another one i heard of was also a battery desulphator which was only supposed to be used if absolutely necessary, but some people just left on permanently 'trickle charging'. I ran an FJ1100 for a few years and it was as a member of the owners group on Facebook that I started to hear about these problems.
The usual problem with battery failure (and this goes for a string of laptop batteries as well as the 6 series cells in a lead acid '12v' battery) is a problem with just one single cell. That cell then starts to limit the overall performance of the other cells because they're connected in series.
A common lead acid fault is that the cells are all slightly different and one cell, slowly over a period of time, drifts downwards in terms of maximum voltage on charge. The answer is a deliberate overcharge, so that the cells around it become overcharged while at the same time the low cell gets enough current to raise it's voltage upwards. This is called a 'balance charge', or 'equalisation charge'. It's worth a try with all low performing batteries if you were thinking of changing it anyway. https://batteryunive...ualizing_charge
The basic procedure is to charge the battery pack to 2.5v per cell, so for a 6-cell 12v battery that's around 15v, while all the time monitoring it for loss of electrolyte, outgasing, and overheating.
Sulphate crystals don't grow in a cell kept at it's highest voltage, where charging causes the sulphate crystals to become reabsorbed. A single cell with a low voltage can become quite badly 'sulphated' and so an overcharge to reabsorb the crystals could take quite some time.
The best tool for the job is a variable power supply, which also gives current limiting control. They cost between £30 - £50
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#8
Posted 29 November 2019 - 01:04 pm
#9
Posted 29 November 2019 - 02:22 pm
I got a fancy power supply I'll give itca go
15 - 15.2V for an hour or two, monitoring the temperature and if you can, limit the current to 1Amp
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#10
Posted 29 November 2019 - 03:48 pm
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#11
Posted 29 November 2019 - 05:04 pm
yes I feel guilty already,
In my defence I did drain her all dow,n and wrap her up in a wool blanket.
Edited by leehenty, 30 November 2019 - 02:01 pm.
#12
Posted 30 November 2019 - 10:54 am
I heard of a few people using these chargers and the battery fails away from home. I'd rather mine fails at home so I can take a different bike.
2002 TDM900 Yellow
#13
Posted 30 November 2019 - 11:50 am
I heard of a few people using these chargers and the battery fails away from home. I'd rather mine fails at home so I can take a different bike.
Dave that's funny, if my battery failed and i had to take another bike i would be peddling the bloody thing
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#14
Posted 30 November 2019 - 12:42 pm
Dave that's funny, if my battery failed and i had to take another bike i would be peddling the bloody thing
Only got 2 on the road at the mo so noting to brag about.
2002 TDM900 Yellow
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