The Sram motor is here, but this video is mostly about the batteries! 

I'm slightly confused, I assume you meant 285Wh/kg, not 185. And yeah, we're at ~285Wh/kg now according to the C/10 measurements. If we go by the nominal data, we're at 291Wh/kg. All ebike battery packs are rated based on the nominal cell capacity. Nominal capacity The regular LG M50T: 5Ah, 18Wh, 261Wh/kg The new LG M58T: 5.8Ah, 20.88Wh, 291Wh/kg C/10 (discharged slowly, over 10h) LG M50T: 4.76Ah, 17.5Wh, 253Wh/kg (not sure how they get 17.5Wh from 4.76Ah, but that's what batemo.de claim) LG M58T: 5.67Ah, 20.4Wh, 285Wh/kg One might notice the increase in gravimatric energy density seems lower than the increase in capacity. That's because the M58T is 71.7g, that's 2.2g heavier than the M50T. Yeah, that's not what you asked about, I just look into it and I might as well share (: I haven't paid much attention to gravimetric energy on the battery pack level. But you're right, that's probably more interesting from an ebike rider's point of view. I'll keep that in mind the next time I decide to a battery video!

@@EMTBVideos Thanks for the detailed explanation! My energy density is calculated simply by the battery Wh and weight. You are talking about the basic battery cell unpackaged. The final packaging of the battery cell is key - gotta be safe for handling the battery, dropping the battery pack, crashing, etc. That is what is finally what the customer actually sees. The trick is how lightweight can these companies make a battery housing that is safe to use and durable. That is where my 203Wh/kg number comes from. Hope this explains my viewpoint. Love your videos!

Thanks. Yeah, I understood the 203 Wh density at pack level, it was the 185Wh/kg I was wondering about. The reason I care about density at cell level is it makes it easier keeping track of any chemistry advancements. But yeah, I should keep the pack density in mind too.

Yeah, 700 Wh is more than enough for me too. And swapping the cells making that battery 835Wh won't make it any lighter, but I guess it will be more expensive. What I find more interesting is if Specialized made the same battery that Sram just introduced. The Sram 630Wh battery seems to be slightly lighter than the Specialized 3.155kg 500Wh battery! If Spesh introduce a 3.1 kg 630 Wh battery, it'll be about 700 gr lighter than their 700 Wh battery.

Yeah, all current batteries will fit these new cells and yeah, I assume the third pattery battery manufacturers are on it. But I also believe all the ebike motor system manufacturers will be switching to new cells. I don't think it makes sense for them to wait untill they release the next generation of motors and design a new battery in a different enclosure. I'm hoping and expecting to see several existing battery packs getting new cells in 2024.

Yeah, but that's the "old" chemistry, same as the regular 5 Ah 21700 cells. I did a video on the 400 Wh battery using the same 22700 cells.

A 3 kg motor is fairly normal, probably very close to the Bosch P-CX. And even though a slight reduction in battery weight might not be a big deal for the ~25kg emtbs, I still think it's great that the improved cells have arrived. It doesn't result in lower weight in most cases, but it improves range. Comparing it to the older 625/630 Wh batteries, it is lighter. But it's basically a 540 Wh battery that's bumped up to 630 Wh with little weight increase. The high-nickel cells have been seen as less safe than the less energy dense cells. All else equal, packing more energy in the same space increases the risk of "thermal runaway". But there are ways of reducing the risk and improving safety. Like "doping" the catode with a very slight ammount of titanium to stabilize the battery cell. I haven't read much about these LG cells yet, so I don't know if there's any increased risk with these cells. But frankly, I would be surprised these are less safe than what we've been using so far.