a thread on another forum prompted me to bring out the Goal Zero 7w panel for a yearly check... the Fujicell charger I typically use for charging has a AAA as well as AA capability, but the GZ Guide 10 pack does not... I cut 3 coil sections of approximately .300" spring to use as spacers... not the best conductor, but worked quite well... the AAAs charged from about 1/4 charge as indicated to full in about 45 minutes... the higher capacity AAs take about 2 1/2 to 3 hours