My solar charger charges a "battery pack" with 2 AA's (Currently Eneloops)...but the battery pack has adapters for cell phones, I-Pod's what-ever...So I could put scavanged AA's (Alkies, lith's, whatever), or use pre-charged R/C's, or even charge the other small items direct drive from the solar panel or from the pack with-out the solar panel. Strap the panel to the out-side of a back-pack or out-side my bug-out shelter and forget about it...then top-off my I-pod at night...or swap the batteries in my E2L-AA if needed.
Got a quality kit for $89...now I can charge my goodies either staying put and "hidden" from the "zombies", or on the move...and save my time scavenging 12V car batteries for water purification/gathering or food acquisition. Just not crazy about "humping" a car battery back to my shelter unless absolutely necessary...and I like the option of being able to lay low on my time...minimizing my exposure.
I would need a solar charger capable of charging 6-10 AAs a day and a 12v panel to charger a portable DVD player too. Last power outage in 2007 I used up 24 nimh AAs in 4.5 days but I did not have anything to do and have better lights now that can go through batteries faster (area lights). I have a duracell charger with a USB tap and an IGO Ipod charger by energizer that I can buy tips for anything that takes 4AAs.