Adafruit 3.5 / 1.3mm To 5.5 / 2.1mm DC Jack Adapter Cable [ADA2788]

This convenient 3.8mm/1.3mm or 3.5mm/1.1mm or 1.3mm DC to 2.1mm DC adapter cable  lets you plug one of our solar panels into  our optimized Solar Lithium Ion/Polymer charger !

2.1mm inner diameter (5.5mm outer diameter) is the most common type of DC plug, but you can use this adapter for anything else that has a 1.1 or 1.3mm ID (3.5-3.8mm OD) DC jack! The adapter has little springy parts inside so it can be used with 3.5mm to 3.8mm OD plugs.