10Ah vs 12Ah batteries

ayfy · Nova Slayer Joined: 21 Jun 2004 Karma :

arghhh, following on from my previous topic about cheap vs branded batteries I decided to buy a branded one, apparantly Varta, but I got sent an Exide one instead. Not necessarily a major problem other than despite it having the same model number YTX12-BS (although this is labelled ETX12-BS for Exide) it is 12Ah rather than 10Ah. Does this make a difference, I'm guessing it does but just wanted to make sure before I go through the hassle of having to send it back.

mattish · Spanner Monkey Joined: 09 Aug 2005 Karma :

Its basicly a larger capacity battery, If it fits it will be better Very Happy

1A load on 10Ah will last 10hours approx, so 1A load on 12Ah will last 12hours approx.

carvell · Scuttler Joined: 05 Sep 2003 Karma :

12Ah is better than 10Ah, as mattish said.

A 10Ah battery is more than sufficient as it is for a bike that is working correctly, 12Ah just means that when your bike won't start, you can try to start it for longer. Wink

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stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

The part number you gave "YTX12-BS " is for a 12Ah battery anyway if my memory serves me correctly. Had they sent you the exact Varta one, it would also have been 12Ah. This is what the '12' in the number referrs to.

The letters referr to the size, the number is the Ah rating and the two following letters are the orientation and type of the terminals.

If it was a 6v battery there would be a '6' in front of the number so for example a CG125 would take a 6n6-3b which is a 6v, 6Ah battery.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
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syl · World Chat Champion Joined: 05 Dec 2005 Karma :

stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

Well that makes absolutely no sense whatsoever and flys in the face of having a reasonably standardised numbering system for motorcycle batteries. Confused

____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

mattish · Spanner Monkey Joined: 09 Aug 2005 Karma :

I think thats just an error in their product description, that part code should be 12Ah as stink has suggested.

Or maybe not as the case may be Confused

ayfy · Nova Slayer Joined: 21 Jun 2004 Karma :

specs from yuasa site

Battery Family: Maintenance Free
Battery Type: YTX12-BS

Voltage: 12
Capacity: 10
Dimensions: 6" x 3.4375" x 5.125"
Weight: 7.5 lbs.
Metric Dimensions: 150mm x 87mm x 130mm
Metric Weight: 3.4 kg
Polarity:
Acid Volume: 0.6
Amps: 1.2
C.C.A.: 180

I'm assuming the capacity is the 10Ah bit, my existing battery is a Rob Hunter battery YTX12-BS and it's 10Ah and I've seen many Yuasa or Varta batteries on many sites that say YTX12-BS is 10Ah.

anyway, sounds like the battery I've got is not a problem, it's about 4mm taller than the other one but I'm sure it'll fit.