I’m cautiously optimistic. Mixed bag of feelings.
Man I really wanted to test run and be able to use these before the fall fully sets in up here. There’s so many great biking tracks out here that run for many miles. Trying not to get over excited since I still have to check what I actually get. Boards are done, just need powa. And to set the VESC and controllers…
Arrival maybe tomorrow probably Saturday while Im at a local Oktoberfest 
but also 
All kinds of delays with the shipping this week through each sorting facility except for maybe one… I think the remaining battery and my battery to esc xt90 cables arrive tomorrow as long as no further delays in transit occur.
Im looking over the first battery and it’s what I ordered so that’s fine.
There’s some nitpicking things I’m already going to address like fusing the charge port.
The main thing I want a community review of is the spot welds. I think there’s a few that may need a do over. In the photos I’m putting in I pulled back the fish paper to get a look. The p groups have 3 different welds. We’ll call it 1 2 and 3 based on what looks like 1 acceptable to 3 Im not too sure the top layer is good enough.
Thanks in advance!
Type 1: maybe about 1/3 of them
Type 2: maybe a little less than 2/3
Type 3:
Type one looks a bit too hot but I wouldn’t redo it, type two doesn’t look bad at all to me, maybe slightly too hot but good enough, type three looks like it’s not sticking well enough, those I would preferably redo.
Can you get a finger or a plastic tool in there to try and pry up the nickel strips at all? That is how I would test the strength of the spot welds since if it is welded on properly it won’t really budge but a bad weld would easily break off. Don’t put too much force though as you could end up ripping the nickel strip itself if the weld is good.
Found these nice visual guides from a published article that should help for a non destructive test:
Thats a nice summary in photos. Thank you for that! I tried to wedge a credit card under those weak looking ones and put some leverage to them no movement.
I think there is some serious nitpicking going on here in terms of welds, all of these look passable to me. It is odd how the type 3 shows stacked nickel strips tho
Welds look pretty good. All that matters is that they hold, give the battery a good cycle or two and see if it charges to full
3 layers where its stacked. A tab for the p group bms wire a main nickel layer that appears to have the type 1/2 welds and then the 2nd nickel layer with the type 3 welds.
This stacking and type 3 weld is only on the terminal ends with the main pos and neg leads.
Maybe its to reinforce the nickel where the heavy soldering was taking place?
Second battery’s welds are more uniform than the first which are nice and secure. Weld type 1 at all points.
I’m pleased that they finally arrived and seem to be in good order. Did test ride my spouses board with the first battery…may need to limit that thing so she doesn’t off herself as she gets used to it. 
these things kinda really rip…
I did have the positive wire fall out of one of the xt90 connectors, kinda annoying but I soldered it back in…
Ok, so I said once this was resolved I would say who the vendor was so these batteries are made by MBoards.
Like I said previously, nothing but great experiences until this. Even this was tied to some extenuating circumstances which they did let me know about. I would just recommend to them to build some redundancy to keep improving their business.
I will add a charger fuse and more insulation as well as pick and pluck to pad the batteries so theres no room to move jiggle and shift though.
Wanted to follow up on this since its been about 6 months and several cycles through both batteries. The balance leads all are showing acceptable measurements on my volt meter. They’re still holding charge and cycling fine. No major concerns on my end running these moving into riding season. I do want to upgrade to a smart BMS at some point but, the Dalys are doing the job fine for now.
