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[oooo]

Hi all, new member asking his first question.

My bait boat that i use for fishing run's on the above (4-5amh) does anyone know how i can charge them on the bank? i carry a 12 volt leisure battery so ideally some way of using that would be great.

[dougal99]

Hi oooo

I have a X-peak 3 Plus charger, bought from Model Power, which works from a leisure battery which charges lead acid batteries <12v as well as Ni-cads, Nimhs and Lithium.  Cost around £70 ISTR. Haven't used it on lead acid but it works well on Ni-cads and Nimhs.

HTH

Doug

[oooo]

Would that model charge 6 volt?

[dougal99]

oooo

Sorry should have made it clearer. <12 volt, means up to 12 volts.

Cheers

Doug

[cbr900]

Up to 12 volt and anything in between..

Roy

[Stavros]

Get hold of a MFA Field charger It will work off a 12v batt,I use one and it does work,will pm you tomorrow with relevant phone no's and which one you need Stavros

[Doc]

Lets see...
Buy second 6 volt battery. 
When the first one goes dead swap for second battery. 
When second one goes dead, wire both batteries in series (12 volts) and charge from your car's electrical system.
No guarantee offered or implied...
 - 'Doc

[BobF]

Hi all,

Is it ok to fast charge sealed Gel batteries ?

I've only seen over night chargers (8 hours etc) advertised for this purpose.

I don't know the  answer, it's just another question.

Bob

[Colin Bishop]

Is it ok to fast charge sealed Gel batteries ?

As a rule, definitely not as it will cause them to get hot and gas with the likelihood of doing terminal(!) danage. For full size batteries you can buy smart chargers which monitor the voltage and temperature of the battery and adjust the charging rate accordingly. They start off at a high rate and gradually tail off to a maintenance charge. You can get similar chargers for model NiCAD bateries but I'm not sure if you can get ones suitable for the small gel cells that we use. No doubt somebody on the Forum will be able to offer more definite advice on this.

[A Model World]

There is one gel cell lead acid you can rapid charge at 1/10th its capacity so a 5 amp hour would require charging at 5amps or less
why not pick up one of these jump start sets that has a charger included and charge 2 at 12 volt as suggested by another poster or better still 2/3 pr 4 batteries is usually cheaper.
 

[martno1fan]

Hi all, new member asking his first question.

My bait boat that i use for fishing run's on the above (4-5amh) does anyone know how i can charge them on the bank? i carry a 12 volt leisure battery so ideally some way of using that would be great.

hi there are chargers on ebay for 11 pounds that will charge it from your car lighter socket!!do a search or look herehttp://http://cgi.ebay.co.uk/Intelligent-Multi-Fast-Charger-for-NiCd-NiMH-batteries_W0QQitemZ290000494750QQihZ019QQcategoryZ48618QQcmdZViewItem

[Doc]

Bob,
Nothing new in this post.  Most gellcell batteries should be charged slowly.  There are exceptions but unless the specs for the battery specifically say that it can be fast charged it's better not to.  Colin is right, a fast charge on any 'sealed' battery tends to produce gas inside the battery case.  Enough gas produced and you have either a warped battery case, or it has vented and you have a much worse problem (the ~least~ of which is a totally ruined battery).  Slow charging produces the same gas but at a much slower rate so that it can be re-absorbed into the 'gell'.
In general, meaning there are always exceptions, the 'thicker' the 'goo' in the battery (dielectric) the faster it can be discharged/charged.  The 'thinner' the 'goo', the more charge the battery can hold.  If you need a supply of current for fairly long periods of time (but not a huge amount of current at one time) a 'wet' lead/acid battery usually lasts longest.  'Wet' cells also have other potential problems so are not exactly the best choice for modeling (gas produced by wet cells is acidic and loves to 'eat' models).  If you need a huge amount of current for a fairly short period of time the more 'solid' type batteries are the way to get it (cad, nimh, lipo, etc).
And the 'bottom line' for most modelers is cost (nasty word, isn't it?).  The 'wetter' the battery the cheaper it is, sort of (and -that- statement is broad enough to hold half the land mass on this planet!).  The more 'solid'/denser the battery 'goo', the more expensive (eg: lipo's).
And with that I'll shut up, 'cuz you didn't have any need to know it, it certainly isn't 'exact' by any means, and I gotta go to work.
 - 'Doc

[John - ModelPower]

hi
you must slow charge sla batteries, they are not designed to be quick charged contact action electronics for his box of tricks
  it is easier just to have more than one 6v 4ah batteries they are far to cheap look at our web site www.modelpower.co.uk
                      john Modelpower.co.uk