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  2. Water-activated battery - Wikipedia

    en.wikipedia.org/wiki/Water-activated_battery

    Side-view of water-activated radiosonde battery Radiosonde battery still in protective wrapper Typically, a large variety of aqueous solutions can be used in place of plain water. This battery type is specifically designed to pollute less (see environmentally friendly claims) due to the lesser use or the absence of heavy metals .

  3. Sump pump - Wikipedia

    en.wikipedia.org/wiki/Sump_pump

    Sump pumps are used where basement flooding may otherwise happen, and to solve dampness where the water table is near or above the foundation of a structure. Sump pumps send water away from a location to any place where it is no longer problematic, such as a municipal storm drain, a dry well, or simply an open-air site downhill from the building (sometimes called "pumping to daylight").

  4. Reserve battery - Wikipedia

    en.wikipedia.org/wiki/Reserve_battery

    Reserve batteries may be activated by addition of water, by adding electrolyte, by introducing a gas into the cell that is either the active cathode material or part of the electrolyte, or by heating a solid electrolyte to a temperature at which it becomes conductive. The missing element of the battery can be added before use in several ways.

  5. Hydraulic ram - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_ram

    The device uses the water hammer effect to develop pressure that allows a portion of the input water that powers the pump to be lifted to a point higher than where the water originally started. The hydraulic ram is sometimes used in remote areas, where there is both a source of low-head hydropower and a need for pumping water to a destination ...

  6. Backup battery - Wikipedia

    en.wikipedia.org/wiki/Backup_battery

    A valve-regulated lead-acid battery is a battery type that is popular in telecommunications network environments as a reliable backup power source. VRLA batteries are used in the outside plant at locations such as Controlled Environmental Vaults (CEVs), Electronic Equipment Enclosures (EEEs), and huts, and in uncontrolled structures such as ...

  7. Aquion Energy - Wikipedia

    en.wikipedia.org/wiki/Aquion_Energy

    In 2011, an individual battery stack was promoted to store 1.5 kWh, a shipping container-sized unit 180 kWh. [4] The battery cannot overheat. [5] The company expected its products to last many charge/discharge cycles, [6] twice as long as a lead-acid battery. Costs were claimed to be about the same as with lead-acid. [7] [8]