In USN, we use nonrecharge batts. If we upgraded AA batts to rechargebale, the savings could be over a $1 million.
Current batt cost as low as $.28/batt.
Approx cost of recharge batt is about $4/batt.
Assume = run time:
-Discharge rate nonrecharge 7.8hrs(http://data.energizer.com/PDFs/EN91.pdf)
-Discharge rate recharge 8.8hrs(http://data.energizer.com/PDFs/nh15-2000.pdf)
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