DIY Li-ion battery building kit | Make your own 18650 packs by Micah Toll — Kickstarter
Assemble Your Own Modular Li-Ion Batteries | Hackaday
A Modular System For Building Heavy Duty 18650 Battery Packs | Hackaday
18650 2600mAh Li-Ion Flat Top Battery 3-Pack
Another solderless 18650 holder. This is a very useful link with a lot of information about the battery itself. | Renewable energy, Solar energy, Powerwall