Why does it have a battery? And does it work without?
787831
It 'fakes' a finger touch by creating an electric field around the pen (otherwise the rubber would be too small of a tip) and yes, needs to be charged for that reason.
87795
It does not need a battery in addition to the battery you're testing with. It does need a battery for testing.
1972870
It's battery operated. But don't worry, it doesn't work with batteries, either.
1502012
What's the purpose of a keyless entry lock if you don't want a battery? The battery powers the lock for the keyless system.
240428
It doesn't use a battery. It plugs into an electrical outlet. The cord isn't pictured here but it is included.
1928999
No battery needed. You recharge it with a USB cord connected to your computer.
822690
NO battery, Wi-Fi connection needs power that a battery cannot supply [not for long any how ...]
664532
It has no battery, it comes with a charger that you plug in directly to the electricity line. Works by the same principal as microwave, that is, it needs a constant attach to electricity.
1712860
It does not use any battery. It connects to your source and the power is derived from your source i think.
1569732
It must be plugged in. But it does have a battery because there is a CAUTION: Risk of explosion if battery is replaced by an incorrect type.
330768
Does not have a battery. You can leave it plugged in all the time if you wish.
2181534
Hi Beth, This device has no battery. You need to connect it to a power source. -Anthony
1668088
It doesn't require batteries. It must be plugged into an electrical outlet.
288755
I've had mine for almost a year and it works fine. But I didn't realize it needed batteries till I got it. Not sure if this helps at all, but I hope it starts working.
1981162
It is supposed to be able to work from battery power, so that you can hang it anywhere without a power cord. But mine arrived without the battery option at all. When I questioned this, they said that the battery powered version was not being produced anymore, and they refunded my money without making me return the item.
1607376
It doesn't have a battery, at least not one that is user serviceable. The light socket provides power back to the sensor.
1807649
It requires batteries only if you want to use ALL features of the phone. Without batteries the phone works fine (you can make and receive calls), the speakerphone works great and the display works for making and receiving calls (you see the number you are dialing, but it is not backlit). Without batteries you can't use Caller ID, and the display is never backlit. It also briefly displays a "check batteries" message each time you use the phone. I don't care about the battery-dependent functions because I just wanted a phone that would make and receive calls during a power outage, and the screen works sufficiently to do that during an outage. I hate using batteries if I don't have to so I haven't ever put them in. I'm sure it can do other things too that would work if I used the batteries, but I've never tried. If you are looking for a basic phone you can keep plugged into a phone jack without the need for AC power OR batteries -- this is it. It will ring for incoming calls, show the number you are dialing for outgoing calls and the sound is great. As a bonus the speakerphone works without batteries, Call Waiting still works fine (if you have it) and so do the MUTE and FLASH buttons on the phone. I haven't tried Audio Assist so I don't know if it's battery dependent. It's a real cost-saver that you DON'T have to put in any batteries to get all the basic phone functions. This makes it a truly great backup phone -- but because the sound and speakerphone are so great I use mine daily in my home office. (However I still use it without batteries because I already have an answering machine and call log on the main house phone). One more thing...if you're just keeping it in a closet until the power fails...you won't have to find batteries for the phone. Save those for your flashlight ;) Show