How long does it take you to charge AA batteries with the Ixon and R&C? I'm thinking about getting a GoalZero Guide 10 which takes 4 AA batteries and turns them into a USB charger (can also be recharged via a solar panel or USB and does simultaneous charge and discharge).

Guide 10 Plus Recharger | Power Packs | Goal Zero

This adds an extra step (taking the charged batteries from the Ixon to use in the Guide), but I'm trying to avoid the added expense and hassle of a dynamo to USB device.

Thanks.