18650 vs 21700 battery packs.

[Retrorockit]

There is a tropical storm moving in. Lots of headwinds. 20mph and gusting 25-30mph. I decided to take my longer 36mile ride and see what happened. Went out and 1/2 way back. Sat out the first rain squall at my favorite Irish pub. Finished the ride in a light drizzle. Skipped my 30 mph runs at the end. Not needed due to light traffic. Got home with a flat battery but still PAS 1 powered, I did this as a battery test. The test was a success and so was the battery. I thought I might have more than this left, but it wasn't dead and I WAS trying to stress it. PAS 3 and 4/5 into the wind where normally I'm PAS2
This is probably my last ride for the next few days. This is expected to be a hurricane when it lands a little north of where I am. I'm on the soft side of it, so not too worried.

[Retrorockit]

i found this site having a Black Friday 50% off sale on some of their 21700 stufff. I'll just link to the thread here.

https://electricbike.com/forum/forum/for-sale/deals-and-finds-on-the-web/157799-black-friday-battery-sale

[jaaklucas]

A year and a half ago my Hailong 18650 pack was getting weak after 18000K, 4 1/2 years so I got to looking for a new pack. I found that the 2170s had better stated density so why not. My battery pack guy here made me a 48V 19.5 hour with 2170s in a Reention downtube case. Its a little wider than the 18650s Hailong pack. Pretty much the biggest downtube battery enclosure before a triangle pack. I asked for the Tesla 2170s which he had. Nice pack, no issues, lots of umph.

[Retrorockit]

I got the 21700 in a Hailong Mega Shark pack with 24Ah. The bracket was a PITA. I've seen newer ones that look much better. So you can go a bit bigger in 21700 if you have room for it.