Can it be used while plugged-in? Or does it need to be charged first? (that is, sometimes you don't have time to recharge the battery)
395311
Yes it works plugged in. I have never picked it up and found the battery dead. While using, if the battery needs charging, a red light comes on to indicate it needs charging. So when I am done using it, I plug it in. I have not yet had it die while using. Good battery life.
591715
The battery on my device is rechargeable so there is no need to plug it in to use it unless the battery is dead.
651246
It will not power up unless it's plugged in. After it's on you can unplug and use it fine, as it has enough charge for hours but don't let fall asleep:). It works fine except you can't turn it on unless it's plugged in.
947740
yes you leave it plugged in when not using. I have had 3 of them now thy are great for jumping vehicles. recharges fairly fast.
1157650
It's suppose to be plug charging when you are not using it so when you need it it's fully charge, but the battery don't hold charge anyway so it doesn't matter. I throw away mine, it's not worth it.
146941
Yes, you just plug it into an outlet to recharge it. But you cannot charge something while you are recharging.
294480
You can use it while charging, but it will slow the process. You may use more power to run the device than is going into the battery to recharge it.
423584
It needs to be charged. I bought a car charger for it and keep it plugged in all the time!
739452
I too leave mine plugged in. However, when I have left it out for a little while, always charges right back up. I don't see how the battery can be replaced. I have had mine several years now and cannot complain at all about how it works.
2103404
I charged mine for about 4 hours before I used it. The battery loses juice as it sits. So only charge it before you use it.
928243
I think they say not to use it plugged in, but the charging time is a short four hours and the charge lasts for many hours, so the power it uses without being plugged in is more than sufficient to tackle the job.
503416
You *can* keep it plugged in, but it's not good for the battery. It's better to charge it, then let it run on battery. It warns you about 9 days before the battery goes (when you go to take your temp in the morning, you get a "BA09"... the next day "BA08" etc. But it still functions on those days. I think I charge mine overnight about once a month? So, you COULD leave it plugged in, and it would still function, but my understanding is that you'll reduce the longevity of the machine. (When you need to rely on the battery, the battery life might be compromised.)
1543629
you can use it while charging , it takes longer to fully recharge but it does recharge while being used
199037
Yes, you can. When the unit is fully charged, it cuts off from the charging mechanism. Mine is always plugged in, and ready to go, when needed. Happy screw driving. Does'nt it seem logical? Otherwise, it would be useless when immediately needed. Go for it!!
382744
Mine does not charge while being used. I assume it is not supposed to do so.
173677
If you are using rechargeable batteries, yes it can be used while the batteries charge. If you are using it while it is plugged in, make sure you remove the batteries, unless they are rechargeable.
378200
Yes and no. It needs to be plugged in to charge the device but after its done charging. You can used it without it being in the plug in.