@Bubblesoldier
1). Never Charge your batteries while they are in the mod. Can be dangerous. Always use an external battery charger and always have 2 extra batteries so one set is charging while you are using another set.
2). As
@stols001 stated the white cord is used for updates only.
@Sugar_and_Spice I have read your questions about updating your Aegis. The Aegis is waterproof. The usb plug in on the mod is very tight because of this. Make sure you are seating the plug properly. You can not do this IF a tank is sitting on the mod. Take the tank off and take the batteries out. If you try to update with the batteries in you can burn the batteries up and ruin the mod.
3). Batteries. If your local Vape Shop does not have Golisi Batteries ask them for the brown LG 18650 3.7V batteries. If you have to get the Green Samsung batteries those are okay. Just not a good life span... NEVER NEVER charge the batteries in the unit. This can cause stress on both the batteries and the unit. The only batteries that you should charge in the unit are Enternal batteries like that of the Aegis Mini Kit.
I hope this helps...