Your packs shall be forty,000 or 20,000 mah provided that wired parallel to provide 1.2 volts to your digital camera, which I don’t think is the case. Wired in series, like most battery holders are, will present 4.8 volts at 10,000 or 5,000 mah using D and C cells respectively. But as some one stated routinely out there cells get discharged fast. I found Pre charged cells are more economical and helpful for an novice photographer ratherthan rechargeable NiMh cells. And as someone talked about above, the new ‘XX powered by eneloop Technology” have the upper capability, but rechargeable solely 500 instances.
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