Yet another problem with my er9. So, 2 RD died for no reason, that's being sorted.
But last night I put the er9 on my road bike to charge ahead of a mountain ride today. Battery was over 70pc when I put it to charge, I just wanted to make sure I wouldn't run out. In the morning, I start the ride, two bars as per be Garmin unit. And it wasn't a fluke. I did the whole ride trying not to shift and the battery died at the very end of the ride.
I plugged it in the wall. It was blinking green. It's not exactly the first time I handle the stuff.
So wtf happened this time? How is charging overnight actually draining the battery? Like wtf?
I am losing patience here. I really want that stuff to work, but man... This is really testing my patience, I feel like I should be getting paid to ride that stuff and debug it.

Oh man! At this point, you should get honorary membership for their QA team.

On my last ride, I also seemed to have sudden shift when hitting small potholes. I thought it was one time thing, but then it happened quite a few more times. This was on my second eR9 set. I will keep monitoring this and raise concerns it keeps happening.

Joe from China Cycling at Shanghai bike show just showed the newly updated (again) Blue edition of eRX will come with USB-C charging port on the front derailleur. That is just awesome! L-Twoo clearly thinks of the ease of use for end users. Pretty exciting, to be honest.

I just noticed that Pandapodium put up this comment on their eRX listing

The “Blue Edition” won’t be available til the second half of 2024. The eRX we selling currently are still the all black version but with the previous issues solved.

It looks like plenty of people are asking this question already to them.

My ER9 shipped immediately but hit a snag. The package has been returned back to sender. I have never seen this happening before and I order a LOT. Bad news?

Did you buy the eR9 from LTWOO Official Store and you're in the US? I had this issue twice and ended up not getting the eR9 (my third). I was told it was because restricted item (battery), even though I ordered one without battery, so customs don't allow for shipment. It's a bummer. I was recommended to buy from other sellers to avoid this issue. It's kind of odd, since my first eR9 was from this store, though it was before they became AE Choice seller. Being shipped by Choice may have something to do with it.

If you value reliability over ANYTHING, then buy Shimano.
YouTubers often receive early units and they serve as beta testers. Bad strategy? These YouTubers had the battery with tabs and not springs, which caused most of the concerns.
Your concern over shilling is also warranted. Anybody who has a discount code on anything has an interest in you spending more, mathematically. And so if you don't see a discount code on l-twoo, they don't stand to benefit, which is worse. If they don't make money from it but then users report problems, then they just shit themselves in the foot twice.
I'm very happy with my 5 er9, but I kind of want them to fail to see what happens. I enjoy the tinkering and the grind of making my own bike infinitely more than buying off the shelf pre packaged branded stuff. Shimano for me is a patent troll and SRAM is the worst assemble of engineers in recent bike history, so I will get out of my way to try alternatives.
I still use a Shimano group on an old bike. That stuff will never die. You probably should buy Shimano if your key concern is reliability. L-twoo electric groups didn't exist a year ago. Nobody can tell you how they age long term. They may age like fine wine, they may age like Lindsay Lohan. Do you want modern day Lindsay Lohan on your bike?

I have to agree with many of these. I am now already >5000km on my first eR9. I have to admit, almost half of which are indoor Zwift rides (don't blame me, I am a fair-weather rider and don't like to be miserable on the bike during winter). I got another set for my wife's bike. These days, with discount codes, you can almost buy two eR9s for a price of Shimano 105 Di2. That is just a no brainer for me when I want to maintain more than two bikes. It's also convenient to have "spare" parts on one bike if/when anything goes wrong on the other. Some stores on AE are now listing individual parts already.
I am actually thinking of getting another set for my commuter bike. Still trying to figure out if I should get eGR or eR9. I want to run 2x on eGR, but not sure if that works. I'd imagine if the firmware allows, it should be straightforward since everything else is identical. I do have an extra front derailleur to use, so that would be great.
I am hoping my eR9s would age like Lindsay Lohan on fine wine diet.

where are you getting the er9 for $380?

It was a few months ago when AliExpress and 80 Designer Store both had coupon discounts. It was too tempting to miss, so I decided to buy the set for another bike I plan to build for my wife. Nowadays, you can find eR9 for ~ $400 during discount days, which happens quite frequently it seems. Early this month, it was selling for $400.

This is genius.  I went out without charging the groupset after a few months off the bike, and it was fine for the first 40km until the cafe, close to the cafe the FD and RD were getting slow on shifting (FD wouldnt shift the whole way, RD would take 2-3 presses to react), I set the gears to a manageable gear and then everything died on the way back.  Would've saved me if I did this.

I did see that I had 4% battery life left before I left so it was my fault.

Honestly, this is some of the few small things that keeps me from going away from eR9/eRX. For comparison, Shimano's charging cable is bulkier and probably takes much more space in my saddle bag if I want to do the same strategy.

All the flexibility that comes with LTWOO are so user friendly, from the variable 10-12 speed, user replaceable battery, individual gear indexing, air vent for bleeding, great app for on-the-fly adjustments. I know Shimano/SRAM may already have most, if not all of these, but considering I can get eR9 for a fraction of the price (they are now even much cheaper compared to launch price and I got my second eR9 for $380 after tax), I am now a happy user. I am hoping the second and third generation of eR9/eRX would solve all the issues users are currently having. By then, I would not hesitate to recommend the groupset to others.

It's actually somewhat impressive that they managed to do all these in their first generation product, while avoiding all the patent minefield left by Shimano/SRAM.

Because i'm intellectually challenged, i went for a ride and the battery of the er9 died on me. Folks, don't forget to charge your group regularly, please be smarter than me
I am not using the original l-twoo batteries because of problems with shipping lithium internationally, so i bought what i found, and the capacity of the cells i found is SHIT. Therefore, i think i can get 500km autonomy or so. This is, afaik, the lithium's fault, not l-twoo's fault. Charge your group very regularly, it's quick to do, but no juicy, no sexy. Was a flat ride, was ok. In the mountains, it would have sucked hard.

Does anyone know if there's a garmin data field with the battery indicator of the er9/erx group?

It happens to the best of us! I now carry the USB charger cable with a USB C to A converter, so I can quickly top up just enough to get me home/anywhere to stop and charge using only my phone. Both the cable and USB converter are so compact I can easily shove them in my saddle bag.