Thx @jack.luis but the new fuse arrives tmrw. No point in assuming the risk with only a day’s delay. Don’t wanna cook the unit or worse in the (unlikely?) event of another short.
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Thats quick shipping
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Big daddy Bezos gets shit done 
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Welp, fuses arrived and installed. Welds immediately became pitifully weak and the kweld measured more resistance during the weld. Lesson learned- do NOT buy fuses for a high current application from random, ubiquitous Chinese vendors on Amazon.
I am also in touch w Frank from Keenlabs and he is assisting me with identifying the problem. ISO of a gold plated 300 amp ANL fuse that doesn’t affect the function of the kweld. Anyone else had to replace a fuse in their welder?
Edit: for my fellow Canucks, here is the official Kweld Canadian reseller: Products – Grid Rewired
Fuses are avail here if you ever pop one.
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Can say I realy know any one that has interested to fined out how you did tho
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Hopefully you never EVER have to find out 
if u see above tho you’ll see that I ran CAL and the “pulse” it was supposed to throw was actually a short. Not ideal
Hey, so I ruined my turnigy graphene lipo and I’m shopping around for replacements. For the price of the 5ah 75C graphene lipo I can buy 2x 4ah 60C heavy-duty lipos. The heavy-duty lipo would have a 60% higher capacity with a 28% higher effective discharge. This should compensate for the higher internal resistance, and allow me to do more welds on a single cycle, compensating for the graphene’s longer cycle life. Also the single 10awg wire coming out of the graphene lipo is a huge bottleneck, so the two 10awg from two lipos should alleviate that.
Can someone sanity check this, because I don’t see a point in spending money on smaller, bourgie lipos.
I cant really speak to those specific LiPos, but current-sharing is almost always better for your cells in the long run. I say you have the right idea.
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Yes but unfortunately lipo manufactures out right lie on specks so it’s hard to say with out buying them and testing. You do need to keep some resistance in the system so you done exceed the k weld limit of 2000A
Getting a bit impatient no turnigy batteries available and unclear when available wihtin EU. The givin Ultracell UXL65 is not available nor the bosch SMT.
I can get my hands on:
Ultracell (No UXL) 12V leadcells around 26Ah
Turnigy nano Ultimate 2s2p 6.6A - 90C 1.2mO
Any other alternatives with good results welding 0.2mm strip on 21700 batts? Single 16sp2 pack build so no mass production goals on battery needed, just no explosions 
Cheers
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Go to a car battery store and get something powerfull, if its too weak just return it and get a stronger model they are pretty casual about it, atleast thats my experience.
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So there is no limitation on amps that I need to be carefull with?
You will most likely be under the 2000A limit, adding some resistance in cables is easy if you are over the limit
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thanks
I also say get a car battery. Last year I went and got a 700CCA battery from Auto Zone, with a coupon. About $115 out the door. I keep it on a 13.5v charge during use and the KWeld behaves perfectly. Calibrated easily on the first try. And on the charger, it never runs low. It can take plenty of abuse from a welder and even then, it’s nothing compared to what gets asked of it inside a vehicle.
I feel like I’ve typed this exact thing like ten times…but I will continue to recommend a car battery. Aside from the weight of putting it on the bench, there aren’t many downsides.
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Hahahahaha I was just gonna say I’ve definitely read this word for word before
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instructions unclear I now have 150 pouch cells
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What are your thoughts of two of these in parallel for supplying the Kweld? (https://hobbyking.com/en_us/turnigy-nano-tech-plus-5000mah-3s-70c-lipo-pack-w-xt90.html). The Turnigy Panther Graphene batteries are out of stock in the USA.
Also would you recommend purchasing the firmware upgrade tool as well?
Great Will spread the word then. Was a bit afraid killing the k-weld with the high Amps of car batteries but that already is mitigated. Will visit the local carpart shop and look firma decent one. At least readily available.
Charge the thing with my lab powersupply otherwise ending up with a charger to charge the batteries to charge…
Thanks!
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Packs not available and expected soon by HobbyKing support so the reasoning for my finding alternative widely available. Result car batteries.
Also contacted K-weld last week on the firmware tool not required since no firmware updates were to be expected any time soon Cheers.
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