If you want a few more cold cranking amps in your 790 you can upgrade to the battery for a 1290. I use the same battery size as my SD GT. The OEM 790 battery was not great quality and an odd size. There is a thick rubber mat under it which can be replaced with a thin mat and the 1290 battery fits perfectly.
battery help
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FALSE
AGM batteries come 1 of 2 ways, already filled and sealed like a lead acid battery or with their electrolyte in a separate container that the purchaser puts in the battery casing then seals. And if you want to get technical, AGM batteries are lead acid batteries, they just use the glass matt to prevent acid from sloshing around inside the casing making them last longer and provide more consistent, stabile and equalized voltage across the cells.
There are incredibly few batteries left in any application that are not sealed after being prepped for use that would need to be "watered" and I have never seen one for a motorcycle, ever.
that's awesome. through cold winters as well???Just replaced the original Yuasa battery on my 2014 Super Duke - build date was Feb '14. Lasted 9 years! Yup, bought another one!
9 years may be a bit long to expect, but i think a motorcycle battery should last longer than 3. just my sentiment.
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Damn, I must be really old, these were standard on every bike I owned back in the 80's:
Pop the caps off and add distilled water, especially when you lay the bike down and a little comes out of the drain tube! One of my jobs way back then at the local Suzuki dealership was to fill every battery and put them on the charger before installing in new bikes...
Dang! Yeah, you might be old if... 🤣
Guess by the late '90s when I got in the game they'd gone to sealed stuff. With the lean angles bikes reach today and just the orientation some batteries have to be mounted, those old things would not do well. I had a Triumph that the battery laid on it's side under the rider seat. There was nowhere else to put it on the bike since it had undertail exhaust. There wasn't even any "trunk" space.
Well that was blunt..
I will plead guilty to over simplification. AGM batteries as you say are sealed after their original fill. Most often now prior to shipment if purchased on line and sometimes in store at time of sale. For reasons of liability and hazardous shipping regs the acid pack is the exception rather than the rule. Batteries that need to be "watered" are wet cell batteries. AGM, Gel and wet cell all lead acid. Wet cell were the standard for motorcycles at one time and are still available and are often the only option for vintage or classic bikes.
With over 60 motorcycles in my history of: off road, road racing, adventure touring and a current fleet of eight that I regularly ride and maintain I have experience with the evolution from wet cell through to Lithium and weather conditions from sub zero to AZ desert. My point was that one should not be worried about a pre filled AGM battery. Pretty much every new bike comes with one!
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