I bought a battery for my 750 back in January, it was $39.99 with free [Prime] shipping. I've used AGM Scorpion batteries for years, typically lasted at least 3 years but thought I would give these a shot.
https://www.amazon.com/gp/product/B01GEVTGFI/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I dont normally buy extended warranties but I did for this, 3 years for $5.99.
Amazing…. They actually are getting cheaper!
I just ordered a new AGM for my 750 - $160!
Geez….. Next time check out Steve’s Amazon link? Looks like you could have had four for that money?
Well...one of the things I learned when I worked building automated assembly equipment for companies like Gates Energy (now Enersys) and some other battery makers whom I can't name was: up until 2010, only Japan in the Far East made batteries with virgin purified lead (Yuasa was mentioned). All the others recycled lead from various sources (including US Military shooting ranges!) to make their batteries. The result of this less-than-pure lead was: early battery death and poor high-current delivery. The fastest way to "check" the specs of a battery to see if it is virgin lead or not is to look at the Cold Cranking Amps and its Duration: virgin lead batteries will deliver more than 2x as much (and up to 8x as much) CCA when cold and will also outlive the recycled lead battery by as much as 4x in years.
The famous "6-pack" batteries that look like little cylindrical batteries (which they are) all matched together are the hottest tech, period. The AGM tech came from them, as a way to get similar acid-cell storage without infringing on the original Gates patent. Sadly, though, when Gates sold this tech to Enersys, Enersys discontinued the 6-pack batteries for bikes. The engineering guys at Gates Energy (whom I knew and built equipment with/for) were about 80% bikers by numbers, riding SOHC Hondas, H-D, Kawis and Suzy's to work. None had a Yamaha, which I always wondered at...today's AGM batteries, like the new Yuasa I just bought, have a very high CCA rating, like the last one of these I had (which lasted more than 6 years). It is now 1cm shorter in height than my last AGM from them, so now the battery strap fits! I had made a metal one for the old battery, as the OEM strap wouldn't come close to reaching that far.
If I hadn't already installed it, I could tell you what the CCA rating is on this one (because I forgot the actual number, just noted it was high): the battery box is in the way, now.
Virgin lead right now is very expensive thanks to the collapse of American mining interests in the last 2 years. Recycled lead that comes from other batteries (which is most of it) has lost most of its covalent electrons, so it will become very porous and lose its surface area for the acid reaction in short order. That lead costs about 8% of the price of pure lead, so a lot of battery makers are using it now just because of price competition. Some (from China) are claiming to be mixing new and old lead together to make a "better battery" (better than what?), but there is no engineering info to say HOW MUCH new lead is being added to used lead - typical Chinko market doublespeak, IMHO. In real life this results in a battery that performs well for a short while, as the new lead must give up its electrons constantly, even when the battery is not being used, to balance the surface charge between the multiple qualities of lead in order to maintain the charge: over time. This causes ion circulation while the battery is idle, so after a few months all the lead is reduced to a lesser quality as it balances itself out - much like the way water seeks its own level when released: it always goes to the lowest equal level.
Sorry for the drone-on...Chinko crap and their constant lying about it makes me really, really mad...
