I replaced 12x 12v batteries in my UPS stack this weekend and ONLY insta-welded two connectors.
I see this as an absolute win. Be careful, folks. Just because it’s DC doesn’t mean it won’t cause serious damage.
Edit for Clarification: When done correctly, the batteries should not arc. My problem is I did not wire the array correctly the first and a-hem second times. It only cost me one battery, which is a lot cheaper than a trip to an American ER.
![](https://kbin.life/media/cache/resolve/entry_thumb/99/8d/998dce47dd65c3f10fa20f9ead44a29c0aefb1d1cb7f6e5cdac7e687ddc9933c.jpg)