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Gel batteries

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Despite a week on the Accumen charger, my 18 month old Varta will not crank my Interpol 2 (rotary) despite showing 12.8v A car battery at about the same voltage spins it over well enough to start on jump leads. I'm pretty sure the battery is shot for electric start purposes. What are the views on gel batteries (I'm thinking Odyssey) when it comes to cranking power? are they worth the money?

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A fully charged 6 cell lead/acid battery should show 13.2v, so yours is reading a little low.

What does the voltage drop to while you are cranking the engine?

Have you checked the condition of the cables and terminals? Maybe the voltage cannot reach the starter?

Mike

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Well it doesn't crank but the voltage drops to between 6.5 and 8v when the button is pressed. sounds like 2 or three cells are out. cables are good. Pretty annoying as it's not more than 18 months old. Of course, did I keep the receipt?

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Hi Dave,

Have a look at www.motobatt.com These are Absorbed Glass Matt batteries which wereinitiallydesigned for high temp / vibrationapplications.

Seehttp://en.wikipedia.org/wiki/VRLA_battery

Yes I know rotaries do not vibrate but this is alsousefulfor Commando's, some of which I am told do. They are as good as a Gel battery, can be mounted in any orientation.

I have been using a Gel on the Commando for a couple of years and it seems to have more oomph (technical term) than the standard lead acid and you never need to fill or worry about discharge.

If you are dropping to 6.5 - 8 then it is shot. Replace it.

Cheers

Tony

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I bought a gel battery for my Interpol 2 as they are supposed to have a higher cranking current and be resilient to being left discharged in the cold (not that I would on purpose, but we all forget to connect up the charger quite as often as we should in the winter).

Unfortunately, I got a duff one which failed the first winter. I didn't have the receipt, but the vendor, tayna.co.uk, had a record of the purchase and gave me a replacement, so I must give them credit for their honesty. The current one is holding up just fine.

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I am now a total convert to Odyssey; yes they cost a bit more, but they do seem to perform very well indeed. Their self-drain characteristics are something to be seen and even after a long period of no-use, their voltage and current dumping abilities are remarkable.

I have a PC310 on a Mk.lla Commando which is only a nominal 8Ah rating but for a non-electric start is perfectly adequate. It also allows some spare space for tools.

I have managed to fit a PC545 onto the Interpol 2 but had to grind off the upper battery loop mounting to do it. It now turns over at quite a speed.

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Previously wrote:

Hi Dave,

Have a look at www.motobatt.com These are Absorbed Glass Matt batteries which wereinitiallydesigned for high temp / vibrationapplications.

Seehttp://en.wikipedia.org/wiki/VRLA_battery

Yes I know rotaries do not vibrate but this is alsousefulfor Commando's, some of which I am told do. They are as good as a Gel battery, can be mounted in any orientation.

I have been using a Gel on the Commando for a couple of years and it seems to have more oomph (technical term) than the standard lead acid and you never need to fill or worry about discharge.

If you are dropping to 6.5 - 8 then it is shot. Replace it.

Cheers

Tony

I've fitted a MotoBat MBTX16U to my 850-ES and am pleased with the result - it's a proper cranker!

Suppied by WEMOTO.COM

Rgds

Mark

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Previously wrote:

Despite a week on the Accumen charger, my 18 month old Varta will not crank my Interpol 2 (rotary) despite showing 12.8v A car battery at about the same voltage spins it over well enough to start on jump leads. I'm pretty sure the battery is shot for electric start purposes. What are the views on gel batteries (I'm thinking Odyssey) when it comes to cranking power? are they worth the money?

Dave

Before you bin this battery (if you still have it?) I would give it a proper charge on a 'normal' battery charger. The low level charges that are designed to trickle charge a battery for long periods often do not bring a low battery up despite leaving it on for some time. A good half a day on a decent charger might bring it back to life.

Al Osborn.

 

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