On your altar, place the item beside the candle. You light the candle and incense, then invoke, adding that you seek to charge the object. In your mind, see energy from the smoke and flame infusing the item with power. You can use this to charge protective items, love amulets, money-drawing charms, etc. Just because you're doing magick doesn't mean you can be reckless.
Candles are an open flame.
A little fire safety is in order. Never burn them near drapes or hangings. The flame may be small, but its heat can eventually affect things that seem high enough to be safe. Do not leave a burning candle unattended. You can relight it later.