User content is not official advice; where it conflicts with official documents, the official documents prevail.Safety & Use Guidelines ›
Reported project: [DIY] AWithZ U3 Pro spot welder: a home-made spare battery for a power drill, 21700 pack welding, efficient welding with half the effort
We will review it as soon as possible and may contact you for more material. Projects found infringing will be taken down.
Back to projectWe only use essential cookies, plus one performance measurement you can turn off. Cookie Policy
We'll review it within 1–5 business days. If you left an email, valid feedback earns points redeemable for accessories / coupons.
If we need to follow up, we'll contact you at the email you left.
Avatars must follow community guidelines: no other people’s likeness, brand logos or prohibited images; violations are reset by moderators.