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  2. Comparison of commercial battery types - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_commercial...

    Cell chemistry Also known as Electrode Re­charge­able Com­mercial­ized Voltage Energy density Specific power Cost † Discharge efficiency Self-discharge rate

  3. Nickel–cadmium battery - Wikipedia

    en.wikipedia.org/wiki/Nickel–cadmium_battery

    Ni–Cd batteries contain between 6% (for industrial batteries) and 18% (for commercial batteries) cadmium, which is a toxic heavy metal and therefore requires special care during battery disposal. In the United States , the expected battery recycling cost (to be used for proper disposal at the end of the service lifetime) is rolled into the ...

  4. Toshiba - Wikipedia

    en.wikipedia.org/wiki/Toshiba

    Toshiba invested a total of ¥319.9 billion in R&D in the year ended 31 March 2012, equivalent to 5.2 percent of sales. [116] Toshiba registered a total of 2,483 patents in the United States in 2011, the fifth-largest number of any company (after IBM, Samsung Electronics, Canon and Panasonic). [116]