ptsPostLog in
Post

User content is not official advice; where it conflicts with official documents, the official documents prevail.Safety & Use Guidelines ›

PrivacyTermsGuidelinesFAQFeedbackFeedback Center
Cookie SettingsTrending
© 2026 AWithZ
Post
LV3
Chubby Li~Sample@Lilu.ID ·
#Power bank#U3 Pro#Handmade DIY
My first self-welded power bank, 20000mAh, and it lights up!
I was always too scared to touch spot welding — afraid something would blow up. The day my U3 Pro arrived I practiced on scrap nickel strip all afternoon, and today I did it for real. Six salvaged cells, sorted by internal resistance. Tested it with a flashlight after welding: in 38 minutes it charged my phone full twice. Grinning like I'd found money on the street. My wife says I'm acting like a kid. Yep.
|
Anyone else burned by a power bank? I went for a battery spot welder — power-bank freedom! Totally hookedProjectsChubby Li~
Share 866 74 190

Comments (10)

MePost
李
李大胖~Author · 1 yr ago

Everyone who grows batteries, you need this spot welder, works great!!! It's in my showcase, this is the official store @JueqiTech Hardware Tools Store AWithZ

1Reply
Post
一
一个不为人知的名字 · 1 yr ago

Blade battery

1Reply
Post
.
... · 1 yr ago

Picking batteries so creative

LikeReply
Post
O
Online · 1 yr ago

Fun

LikeReply
Post
天
天地英雄龍 · 1 yr ago

Quite the green thumb

LikeReply
Post
浮
浮生如梦 · 1 yr ago

A dab of toilet-bowl cleaner and it solders right on, is buying a machine worth it for me to solder one?

LikeReply
Post
L
Lin.. · 1 yr ago

Post more exposing daily essentials, these smart gadgets bought online

LikeReply
Post
小
小钟的H12Y+啊 · 1 yr ago

22.5W fast charge + 30,000mAh is about ¥80

LikeReply
Post
沐
沐沐陽 · 1 yr ago

Can it spot-weld other things, like LED strips

LikeReply
Post
川
川j · 1 yr ago

Mine's self-built, 4 cells at 20000 each, this one's probably similar capacity; as for that foam pad, it's purely a spacer reserved for the bigger-capacity version, universal size, couldn't be bothered to redesign

LikeReply
Post
No more