environmental
aa
accumulator
alkaline
aluminium
background
battery
charger
chemical
concept
contamination
danger
detail
device
different
discharge
ecological
ecosystem
efficiency
electric
electrical
electricity
electronic
electronics
energy
equipment
generation
green
group
group of objects
heart
many
metal
multicolored
object
pollution
power
recharge
rechargeable
recycle
recycling
refill
shape
source
stack
technology
variety
various
waste
white
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