7
2009
Rechargeable battery
Rechargeable batteries can offer economic and environmental benefits compared to disposable batteries. Some rechargeable battery types are available in the same sizes as disposable types. While the rechargeable cells have a higher first cost than disposable batteries, rechargeable batteries can be discharged and recharged many times. Proper selection of a rechargeable battery system can reduce toxic materials sent to landfill disposal compared to an equivalent series of disposable batteries. Some manufacturers of NiMH type rechargeable batteries claim a service life up to 3000 charge cycles for their batteries.
Take into account the amount of batteries we use for our child’s electronic toys (my Ethan himself have loads and loads of toys that requires batteries to operate), people, choose rechargeable. Save mother nature, save life!
got all this and more from http://en.wikipedia.org/wiki/Rechargeable_battery