After reading through this thread, it strikes me that my Eneloop XX NiMH batteries, at least on face value, hold a lot of charge at a reported value of 2500mAh per AA battery.
So four of these batteries would be the equivalent of a 10,000mAh Li ion battery pack, at least in terms of capacity? Am I missing something here?
Also, I have read that a typical iPhone can hold about a 1420mAh charge. This seems unreal to me, that my phone holds less than a high-capacity AA battery's worth of charge. Is this all right?
If it is right, then why aren't there more battery banks out there that simply hold multiple high-capacity AA batteries, like the one Tim Zen made above?
If this works, then it seems like the ideal system would be one where the battery pack itself can be directly plugged into the wall (similar to the NewTrent TravelPack Plus), thereby acting as a AA wall charger, but there would also be one or more 5V USB oulet ports where you could transfer the stored charge to your phone/gadgets.
Am I missing something critical here? I must be.
It seems that a system like this would combine many systems into one: phone charger, battery bank, AA battery charger, and AA battery storage for other AA-based systems, such as headlamps.
So you could bring a system like this and not have to take: a separate phone charger, a AA battery charger, or standalone extra AA batteries.
Again, what am I missing? This seems like it would be the ideal system for me on paper for multi-week hikes with town resupplies...