9v
aa
aaa
acdc
alkaline
background
battery
cadmium
cell
charge
close
closeup
connectors
contact
current
dc
electric
electrical
electricity
electronic
energy
environment
equipment
isolated
macro
negative
nicad
nimh
nine
nobody
object
polarity
positive
power
recharge
rechargeable
recycling
supply
technology
top
volt
voltage
white