How many hours will the battery hold its charge on full screen brightness?
1949110
Sorry, I'm not sure. The motherboard just broked 4 months after took it. I took my money back an bought a Mac Pro.
916880
Depends on the brightness set when on battery and how many applications are running. The brighter and more processes there are, the quicker the battery drains. If it's just for light use and not blasted on full brightness it should last about 3-4 hrs, at least that's on my laptop.
1678304
I have found that a full charge will last for 1/2 to 3/4 of an hour if used constantly for the whole time. Also depends on how fast you run it.
1122096
A fully charged battery will last a long time. Several days of continuos use.
1670974
I have had about 10 hours of continuous use on the device with the backlight on. It is a great unit, but carry spare batteries because you go from low battery to no battery quickly.
650113
When mine starts to go a little dim I plug it in at the end of the day an its ready to go the next morning.sorry but I don't know how many hours it takes exactly. I don't think the battery will last for a straight 8 hr but it should last a straight 4 hr. I like mine very much and would buy another one. And its tougher than some people say, I left mine under the car when i let it down, an all that broke was the hook on the top, a little NP1 and its fine.
1071455
My Anker gives me a solid 4 hours of almost fully bright screen and optical drive use. If your 9-cell/7860mAh is rated at 7 hours and performs that well under load it's a great battery. If it doesn't perform that well under load than it could be a "difference" in test conditions. (My Anker will keep my Pavilion dv7 going all day with a dimmer screen and no real use)
2193761
6 to 8 hours if not playing video. 4 to 5 when mostly video (streaming). This is an estimate, I never timed it. There is also a power safe features that I keep disabled. Your power management settings and screen brightness make a huge difference on what you can get out of a single charge.
861259
Yes, about that long if you have the backlight on. I discovered that turning the backlight off (F1 key) will allow it to last all day on a single charge.
1147224
Sorry,I don't know, but it will depend on high you have the brightness. Since it uses D cells , it should last a long time.
675124
Roughly 6-10 hours depending on the light mode you use. Full Details: Using a full charged 18650 battery (3.7V 3000mAh), the beam from the flashlight (on the brightest mode) will stay very bright for about 2 hours. After that time there will be a slow decline in brightness over the next five hours or so. At the end of the 6.5 hours, the battery will probably be drained, with a voltage under load of about 3.0V. So even if you use the bright mode continually, you should get enough light to see your immediate surroundings (at least) for maybe five or six hours. Of course, to save on battery power, you should use the low intensity beam most of the time and that should get you about 10 hours of working time.
1316270
According to the supplied data 157 lumins, fully charged. mine took a while to charge but once it was it had good brightness for well over 4 hrs and was still somewhat bright for about another 1-2 hrs.
1278266
Have only had my replacement battery about 6 months. Have already used it over 5 hours. After charging, its still as bright as when I first got it.
1828093
I never let my battery die completely, but I would say it lasts on my laptop about 4 hours.
1022472
I've never done more than an hour at a time on maximum brightness, but I'd expect to get at least an hour or two from a fully charged battery
148041
I have actually tested the battery life at maximum use. From fully charged, I had the screen at 100% brightness, and going online, I was watching videos. My battery lasted a little bit more than 4 1/2 hours before it went to 0%.
1585344
I did a test on mine which is about 18 months old. On a full charge, 3 lights illuminated on the side, it lasted 27.5 hours. It was still illuminated but about 1/2 the brightness of a full charge. You can easily get 24 hours of useful light out of this.