9volt
alkaline
ampere
battery
blank
cadmium
capacity
cell
charge
component
current
cylinder
electric
electrical
electricity
electronic
electronics
energy
equipment
industry
metal
minus
negative
nickel
ninevolt
object
oxide
plus
polarity
positive
power
radio battery
recharge
rechargeable
source
square battery
store
supply
technology
transistor battery
volt
voltage
watt
white