While is a definite time or date.
While is a period of time.
When do the children play snakes and ladders.
While I was walking to the shop it rained.
Yes, you can use it while it is plugged in.
No, you cannot use your passport while it is being renewed.
It depends. If you don't want to charge it while in use, then you can charge them when not in use. But if you always charge it when you are using it, then you probably don't have too. But if you only charge it sometimes while in use, I'd charge it while in use.
you do not use materials while inventing. you use materials while buiding
No, it is not dangerous to use a cell phone while it is recharging.
It may take me a while to answer your question.
You use the ... bass drum while playing the bass drum ... (?)
No, you can only use one hand while playing Jenga.
Yes, you can use both hands while playing Jenga.
Yes, you can use two hands while playing Jenga.
No, a toaster cannot kill you while in use as long as it is used properly and not tampered with.
You use the muscles in your body.