I don't need a replacement battery at this time.If I buy this battery now and keep it in storage, how many years would the battery still be usable when I need to use it when my old battery dies? I don't need a replacement battery at this time.If I buy this battery now and keep it in storage, how many years would the battery still be usable when I need to use it when my old... » Read More I don't need a replacement battery at this time.If I buy this battery now and keep it in storage, how many years would the battery still be usable when I need to use it when my old battery dies? « Show Less
1302116
Wow... I have no idea... you're asking what the "shelf life" of the battery is... probably only the manufacturer could answer that...
828939
Less than a year. Sealed lead acid batteries need to be kept on charge or else they undergo something called sulfation, which is terminal to the battery. Buying one ahead of time and storing it is a bad idea.
1302117
I don't know the answer, but a search on the topic of: "how long do batteries last in storage" will keep you busy a while. Seems that most batteries will store for quite some time (NiMH being a bit of an exception) when stored in a cool dry place.
1302118
I have never kept a back up battery. But I did have my original APC unit in storage for at least 3 years and when I started to use it again it lasted about two more years. That was with the original battery APC came with. I do not know if the replacement will work that way.
1302119
my advice only buy when you need it as you need to keep charged up . in normal condition it may last 2-3 years at best it may be less i just got mine 2 months ago n still working .
615278
The shelf-life of Li-ion battery "should not" affect the storage capacity as long as it's never been used. I said "should not" because I can't guarantee it. However, I bought this battery and the capacity was never as much as it claims, and starts to weaken after only about 6 months of use.
1182386
Don't assume you can get a new battery. I have had my radio for quite some time and put it away for emergency use. I recently found the battery a little corroded and won't hold a charge. Now, I can not find a replacement battery. I even went to a specialty shop with no help given. Anyone actually "know" where a replacement battery can be found?
1188171
Typically, battery can last up to 3 years, if kept on regular charge cycles. We recommend changing battery every two years.
1596719
Ours is going into the third year with pretty regular use. Be sure you select only an alkaline battery or the new Quantum series by Duracell, with an expiry date quite a ways out.
755302
I have one of these...use it daily & can expect about 6 months to a year from it before I have to charge the batteries.I use rechargeable batteries in mine.I believe the length of time it will last, depends on how often it is used, & what the quality of the batteries are.Example: Duracell bateries will outlast store brand name batteries by a long shot....
1938666
I have had my batteries for two years now and they still works. When not in use I put them up. I don't believe I saw a date and compared to some other batteries that I buy at other places tell me the expiration date and they don't hold up to that date. These batteries are still working and it doesn't bother me if there were an expiration date or not. All I can say is they are old and still working.
1498842
From what I can gather these type batteries have a defined life. It seems under normal usage the s4 battery is only good for about 1 year. Heavy usage (recharging a lot) can reduce the the life more quickly. I plan to replace my battery at least yearly. I try and always keep a spare on hand because a battery ordered on line is so much cheeper that buying one on the local market.
324789
About a year, I think. You need a good lipo charger so you can balance the battery and store properly. It may still be good and just needs a good balance charge. I ran into the same problem with a v912 and the charger brought it back. It is always a good ideal to have a spare battery. Hope this helps.
837624
My first battery lasted 3 years. I kept it in the basement during the winter and charged it every month. But when using it during the summer, I sometimes forgot to disconnect the charger the next day. This didn't happen a lot - maybe only 2 or 3 times a year. I didn't start to notice any problem until the end of the third year. I bought a new battery last spring. I've been more careful with this one and have always removed the charger within a few hours after the light turns green. This battery is still working very well, but it's too soon to know whether it will last more than 3 years.
1378063
Fresh batteries should have an expiration of 5 years into the future. If I received batteries less than 4 years I would return them. Thats just me...
439139
The information says its a "lifetime" battery if I remember correctly. I figure even if I replace it in every 7 or 8 years for my own sanity, then I've still gotten my money's worth in savings on 9V batteries!
826143
I know this was asked in 2010, but it takes time to answer this kind of question. I've had mine since 2011. The battery is showing wear and needs to be charged more frequently than when it was new. When new, I would charge it once every month or so. Now, I'm charging it once or twice a week. Based on how often I recharge the razor in 2014, i'd expect it to last another 1-2 years before needing a full replacement. So, the guesstimated longevity of this razor could be up to 5-6 years. My use is every weekday as a dry shave, never wet. Not used on weekends. I wash the razor about once every 2 weeks and it gets oiled nearly every shave. I know this was asked in 2010, but it takes time to answer this kind of question. I've had mine since 2011. The battery is showing wear and needs to be charged more frequently than when it was new. When new, I would charge it once every month or so. Now, I'm charging it once or twice a week. Based on how often I recharge the razor in 2014, i'd expect it to last another 1-2 years before needing a full replacement. So, the guesstimated longevity of this razor could be up to 5-6 years. My use is every weekday as a dry shave, never wet. Not used on weekends. I wash the razor about once every 2... » Read More I know this was asked in 2010, but it takes time to answer this kind of question. I've had mine since 2011. The battery is showing wear and needs to be charged more frequently than when it was new. When new, I would charge it once every month or so. Now, I'm charging it once or twice a week. Based on how often I recharge the razor in 2014, i'd expect it to last another 1-2 years before needing a full replacement. So, the guesstimated longevity of this razor could be up to 5-6 years. My use is every weekday as a dry shave, never wet. Not used on weekends. I wash the razor about once every 2 weeks and it gets oiled nearly every shave. « Show Less
2170143
I bought the first one 2 years ago, so far the battery is working well. My brother charges it once a month and uses it every other day! Not yet need change the battery, but I guess when ist is gone, the only way is to replace to a new one, after all, it is only 20 dollers after sale.
1278263
These Batteries will last a lot longer than 7hrs. when you get a good one, mine is still working very well. I bought mine a few years ago! I recommend getting them to replace yours! One question,How long did you charge your battery up before using? That might be an issue!
1382885
I purchased my battery last year and the shelf date was 2 years, but I believe their covered for a year after the date on the battery. I guess you should be able to write to the seller (or call) and check on this. There are Medtronic batteries and after market ones.
490418
Since I purchased the Hewlett Packard battery, this is the information straight from their website: "Lower Total Cost of Ownership: One battery has an up to three year cycle lifespan, reducing your overall battery cost since you purchase fewer batteries over the life of the notebook. Flexible Solutions: With up to three years of warranted performance, you can enjoy the entertainment and productivity features of your notebook for longer then with standard solutions." Of course, the actual lifespan of the battery will depend on actual usage and care. It took me three and one half years to need replacement for the first battery; so far, I have had this replacement battery since July 16, 2013; I do not run the Notebook on battery only for long. I make sure to charge it as soon as possible. Hope this helps. Good luck.