the battery have any effect on the environment

the battery have any effect on the environment?
Today almost all the batteries are not mercury, but is still heavy metals mercury batteries, rechargeable nickel-cadmium batteries , lead-acid batteries of the necessary components. If disposed of improperly, and a fairly large number, these heavy metals have a harmful effect on the environment. At present, the international specialized agencies have been recycling nickel-cadmium and manganese oxide lead-acid batteries. Polymer batteries without liquid, zero-emissions, no heavy metals, won its green, environmentally-friendly laudatory. The ideal society of the future environmental protection energy products.
9, the ambient temperature on battery performance impact?
Of all the environmental factors, the temperature on the battery charge and discharge performance of the most influential, in the electrode / electrolyte interface, electrochemical reactions and environmental temperature. If the temperature decreases, the electrode response rate also dropped, assuming that the battery voltage is kept constant, the discharge current is reduced, the battery’s power output will fall. If the temperature rise on the contrary, that the battery output power will increase, the temperature also affects the transmission rate of electrolyte, the temperature rise is accelerating, transmission temperature drop, send slow down, the battery charge and discharge performance will be affected. However, the temperature is too high, exceeding 45 ° C, will destroy the chemical balance within the laptop  battery, resulting in side effects.