For the D Cell NiMH Batteries in case you are interested:
9,000mAh = $8.50 x 10 = 85.00 - 88% more expensive then the 4,500mAh C-pack (but 200% capacity)
11,000mAh = $9.80 x 10 = 98.00 - 117% more expensive then the 4,500mAh C-pack (but 244% capacity
12,000mAh = $11.50 x 10 = 115.00 - 155% more expensive then the 4,500mAh C-pack (266% more capacity)
For the 24 x Eneloop batteries which are LSD @ $100 310% more expensive then the 4,500mAh C-pack (with 12%
lower capacity)
So your best bet for your needs is the 12 x 4500mAh C cells.
By the way - all of these items are from
Amondotech.com - so check there for more info about individual battery weights and such. Ever since I started to use Amondotech's Titanium CR123 batteries (tested #1 by CPF'er Silverfox) - as well as the AA Titanium 2100 LSD (low self discharge), I have been hooked on Amondotech. They have excellent prices as well as excellent batteries, chargers, and service. They're not going to carry a 10 cell, 12V NiMH smart charger, you'll have to look on CPFMarketplace for that. Hope this helps.
Edit - I had a complete brain fart evidently before I wrote this post and had to go back and correct like 10 math errors. If there are any other math errors I apologize.