accumulator
background
battery
charge
charger
charging
collection
daub
design
design element
doodle
drawing
drawn
electric
electrical
electricity
empty
energy
equipment
fuel
full
generation
hand
hand drawn
icon
illustration
isolated
level
load
loading
low
mobile
object
pattern
pen
pencil
phone
power
recharge
scribble
set
shape
sign
sketch
smartphone
supply
symbol
technology
transparent