environmental
accumulator
acid
alkaline
alternative
background
battery
cadmium
cell
charge
chemical
connected
contact
corrosion
cylinder
device
different
dirty
electric
electronic
element
energy
gather
industrial
isolated
little
metal
object
old
pile
pollution
portable
power
rechargeable
recycle
rusty
stack
storage
supply
technology
toxic
trash
used
voltage
white