About
Build a 21700 pack (≥4S) with any AWithZ spot welder and submit photos or video of the finished pack plus a recipe card. Judged on weld consistency, construction and safety (BMS, insulation).
Prizes
1st prize P60F ×1 · 2nd prize UF20B ×2 · 3rd prize welding-pin set ×10
Entries (36)
02:47Building a 12V off-grid pack from 18650
LookAgain135160
01:37Unboxing and testing a small handheld spot welder — very practical and handy
Taozi Unboxing1228110738
02:44You can build a lithium pack at home
Ajie DIY63179427
02:39Episode 732
Electro Wu3573655
02:42AWithZ high-power spot welder — welding lithium cells, handy and effective
Electronics Basics2426014602:47How to build a 12V outdoor-power Li-ion pack from 18650 cells
LookAgain1351631
05:48Ep. 127 | Skip one meal and you can own a handheld spot welder — build your own packs at home
Superman Models112767
02:31Welder at gear 60, welding 0.05 copper + 0.12 nickel-plated steel strip — the results
CrazyFun683819Public voting (daily cap, anti-spam) and results ship in P1; v1 is judged officially.
Submit your entry
Registered · pick one of your posts, or publish a new one with the “#21700 ” tag.
Sign up
Event types
Build contests · technique challenges · Q&A · offline meetups. v1: list + sign-up + submit; voting and results in P1.