Mailbag Monday 231

It's mailbag time again. And it's a good one today. Lots more stuff than usual, and a couple of surprises. Plenty of links this time, too: Type-C USB 1S 1A Lithium Battery Charging Module 18650 Li-ion Lipo Lithium Battery 3.7V 4.2V 2-Way Batteries Charger Protection https://pileofstuff.ca/r/qsoar Ultra-mini Charge Discharge Module 3.7V 18650 Lithium Battery Charging Protection Board Type-C Charge 4.2V 600mA Boost Converter https://pileofstuff.ca/r/gfbki electrolytic capacitor 220uf 10v 10pcs (search link) https://pileofstuff.ca/r/xojyv DC5V Electronic Swing Kit Electromagnetic Swing Experimental Circuit Production DIY Welding Kit Loose Parts swing diy swing set https://pileofstuff.ca/r/h0075 Mini Wire Electrical Connector Boxed 222 LED Strip Lighting Quick Connectors Universal Compact Conductor Push-in Terminal Blocks https://pileofstuff.ca/r/kul1i DC 3V 30RPM Speed Reduction Motor N20 3mm Shaft Mini Metal Gearwheel Gear Motor with Full Metal Gearbox Micro Motor https://pileo