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1 | University of Michigan Rechargeable Battery Calculator | |||||
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3 | Rechargeable nickel-metal hydride (NiMH) batteries are an environmentally preferred choice compared to disposable alkaline batteries. All batteries are recycled on campus as universal waste (ehs.umich.edu/haz-waste/other-waste/). Use this calculator to determine the payback period for rechargeable vs disposable batteries. Using rechargeable batteries for devices that require frequent battery changes may make the most sense. Also consider: with several sets of rechargeable batteries and a charger, you'll never run out as you might with disposable batteries! | |||||
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5 | Battery Type | Number of batteries required to operate departmental devices: | Number of disposable batteries currently used annually: | |||
6 | AAA | |||||
7 | AA | 6 | 36 | |||
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10 | Rechargeable | Disposable | ||||
11 | * Capital Cost ($) | 35.55 | NA | |||
12 | Annual Operating Cost ($) AAA | 0 | 0.00 | |||
13 | Annual Operating Cost ($) AA | 0.24 | 8.36 | |||
14 | Annual Operating Cost ($) Total | 0.24 | 8.36 | |||
15 | Return on investment (yrs) | 4.38 | ||||
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17 | *The capital cost includes the cost of a charger | |||||
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