The cost of laptop battery cell’s power
In this paper we calculate the cost to produce 1000 watts of power for one hour (1kWh) from different energy storage medias. We first look at primary and secondary batteries such as toshiba laptop battery; then compare the energy cost derived from an internal combustion motor, the fuel cell and finally the electrical grid.
The secondary battery
Secondary battery like pa3331u-1brs provides far more economical energy than primaries, as Figure 2 reveals. This analysis is based on the estimated purchase price of a commercial battery pack for instance pa3331u-1brs and on the number of discharge-charge cycles it can endure before replacement is necessary. The calculated cost does not include the electricity needed for charging, nor does it account for the purchasing cost of the charging equipment.
The low costs of nickel-cadmium can only be achieved by applying a full discharge once every 1-2 month as part of a maintenance program to prevent memory. If omitted, nickel-cadmium is on par with nickel-metal-hydride and lithium-ion battery e.g. pa3356u-1brs in terms of cycle life. Lack of maintenance would increase the cost three-fold. Environmental conditions, such as elevated temperatures and incorrect charging, reduce the expected battery e.g. pa3107u-1brs life of all battery chemistries. The calculated cycle life is based on best cases.
Newer chemistries provide higher energy densities than conventional batteries per size and weight but the cost per kWh is higher. This cost is, to a large extent, governed by the number of charge/discharge cycles the battery e.g. pa3356u-1bas can endure.By far the lowest cost per kWh is lead-acid for wheelchairs and scooters. Running a laptop off a large lead-acid battery would reduce the energy cost twenty fold. This, however, would be a hard sell.
The primary battery
It can be seen that larger cells provide a lower cost per kWh than small cells. The energy cost from the AA is more than half that of the smaller AAA. The C cell provides the lowest cost per kWh. The D cell has gone up in cost because of moderate use. Advanced systems, such as lithium battery(pa3383u-1brs), provide very high energy density at a premium cost. The energy cost of the 6-volt camera battery is more than ten times that of an alkaline C cell.
Primary batteries hold more energy than secondary batteries like pa3384u-1bas per size and weight. Operational readiness, long storage and instant readiness are other benefits. Primary batteries contain little toxic substances and are considered environmentally friendly.
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