How long can these batteries last without being installed in a device
1540338
Sorry, have no experience with that. All I know is that I installed it and it is still working. For the price paid I think it is probably worth the risk, considering that one battery in the store costs as much as the multi pack you get thru this site.
1540339
Like the other reviewer when I install them they work. I bought them back In July 2013. You will not beat this price.
1540340
That's unknown to me. There is nothing on the battery or package indicating shelf life. I needed one battery and the cost for 5 including shipping was lower than buying 1 name brand battery without shipping.
251099
I personally do not knwo as I used them for a teaching aid in a project but depending on what batteries you use they can last anywhere from 24-48 hours continuous (LEDs on). The consumption on it in standby mode is very little (~70 micro Ah) so depending on if it is placed in a high volume traffic area or not will also determine how fast the batteries deplete. The consumption when it is on and lite is ~70 mAh.
1847532
I replace them out of habit every 6-8 months. When new and fully charged they will run for a couple of days in normal use; when streaming from my BT player or TV they last through the day I'd say 8-12 hours. I have rexton cobalt 16 rechargeable, put them in charger at end of day, and they are great.
305079
It' hard to say but I have had them last 24 hours on standby. With use and time as with all batteries it seems they develop memory and lose their capability to maintain a charge over a long period of time. I carry two batteries with me and switch them. From the beginning of my day until about 4 o'clock I usually have to change batteries or put it on charge.
1459001
Well, I purchased mine about 6 months ago and they are good until June 2021 which means they are guaranteed for 9 years. Hope that helps! Also, I would recommend buying from Amazon rather than a local store because you will get fresher batteries (higher turnover rate).
902592
I don't know the answer to this, but I do know that the batteries last for months without replacement.
1847534
These batteries last about 12-14 hrs then need a recharge. Their life expectancy is approximately 9 mos give or take. Make sure your battery charger is the correct one for these types of Batteries.
1131159
There are higher output non-rechargeable batteries. These wouldn't power a device I have which will run for about 8 hours with Energizer Ultimate Lithium. I'm groused I can't seem to find a rechargeable that'll power the device.
555189
Batteries will last 20 to 40 hours depending on factors such as quality of batteries and if headphones are being used to save power.
466257
I use these batteries in some burglar alarm sensors, and mark the date of installation. Most of the time (in at least half a dozen instances), I will get between 2 - 3.5 years of service on the Ultralife batteries. It's not 10 years, but it is far more than I would get from a standard alkaline.
1236054
I do not know exactly, but I am going to say at least two years. They rarely need changed. Battery life is impressive.
1928349
I am getting about 10-12 minutes per battery, but I charge them and then they sit for a week. You may get more time if you charge the batteries 12-24 hours before using them. Also keep them in the house if you live in a hot climate. Storage temperature may affect battery life. B&D; also claims the batteries reach full potential after 5-6 charges, but there is no empirical evidence of that.
1392026
Hey Chuck, I bought these batteries about two months ago and they are awesome. I have a two year old EVO 4G and I still like it better then any other phone. The old batteries died and I almost traded in the phone. First I got cheap $2.00 batteries that claimed they were long lasting. The were bad and stopped working well within a couple days. Then I decided to get these batteries. My phones charge can last up to 3 days now. I have nothing to gain from this response, only good Karma if the batteries you get work as good as mine.
1390286
They last pretty long. Make sure you use quality batteries, like Duracell or Energizer. Don't forget to turn them off when not in use. I don't want to attempt to guesstimate how many hours, but we really don't have to change them often. If they start making funny noises, time to change batteries.
299431
This is typically hard to gauge since you can put either regular alkaline batteries or rechargeable batteries I currently have rechargeable batteries in since they last the longest of any non rechargeables, I am using Sanyo batteries and their charger, they typically last me about three months that is if I don't use them on high drain things like games and with games about two months
48204
Not required. I keep them inside. :-) I use rechargeable Eneloope batteries. Sometimes keep them inside for 4-8 weeks without single shot. No problems! The batteries are still strong and powerful.
648151
We have ordered those batteries several times and have had no problems. They seem to last 8-10 days.