What is the 'best before' date on the batteries and how many years are they guaranteed to last without being used?
1458999
These batteries are so much better than anything else on the market,the only comparable brand I'd sunburst but they are double the cost and still don't last near the length or have the same amount of power for serious light,my light takes 2 and I can spread or narrow my beam to light up (AT LEAST 3 acres of full light) or tighten it in to a beam and it will go far than than u can see,in other words buy them you won't be disappointed! SRM
1459000
Best before date is 2021. The guarantee refers to performance satisfaction and does not specify a time frame.
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).
1459002
Best before date is 2021. No years per se related to guarantee, just a general performance satisfaction statement.
1459003
They have a manufacture date of 2012/04 stamped on them and the use before date printed on the battery is Mar 2021. It seems to me they say 10 years but mine aren't allowed to lay on the shelf that long. I like them. I use them. And I reorder them. I prefer the Duracell.
1092729
Batteries do not last until expiration date on this brand. Usually are weak one full year before time. Testing at 1.0 volts or weaker 12-14 months ahead of time.
1910169
I would assume they would have several years, all the batteries I've ever bought on Amazon are very new.
384229
I have had mine for 10 months now and my husband tested the batteries a couple of weeks ago. They still tested pretty strong so my guess would be something in excess of 18 months.
1236054
I do not know exactly, but I am going to say at least two years. They rarely need changed. Battery life is impressive.
595937
I have had them last 5 years with just moderate use per day and up to 3 years with heavy use recharging twice daily..I also do rejuvenate them after that time to get an extra year out of them before I buy new
737143
Genuine Sony batteries will have the "Use by date" stamped on the back of the package.However, this date varies widely from 2017 to 2025 depending on sellers.Read the "Condition" description carefully before making your purchase.
1000194
Beware!! The batteries are only warranted for 30 days!! These are probably used. I got 60 days before they gave up. Neato doesn't tell you that the batteries aren't covered for 90 days until they die!
1321777
I put fresh batteries in before a trip I took for 14 days & I ran it every night. The batteries are still good but I am taking an extra set of 4 with me on the next trip......just in case!
537105
Best I can recall, NO. But this should not even be an issue since one battery will probably last about 10 to 15 years.
1382198
its similar to the date on milk, meaning they are best when used before that date. They will work after and depending on the environment which they were stored in also plays a roll on how well they will perform over time. I have used other batteries and have found that the surefire batteries exceed almost all other batteries for endurance. BTW, all batteries have dates. I hope this helped. One last thing, the light bulb over time can loose strength as well, so it would be prudent to check the condition and I try to make a habbit to replace the light bulbs when they prove to be taxed by use.
1949368
I haven't had Wasabi's long enough to know about them in particular... Just generically, a decent lithium cell should be good for a few hundred cycles or 3-4 years... generally lasting longer if stored about 50% charged and at cool (40-70F) temperatures. Storing them completely discharged (or allowing them to completely self-discharge) isn't a good idea. These things are somewhat unpredictable -- ask Boeing -- but most of us hope to get a few years out of them...
1209399
I did not. The date on the batteries was: March 2016. Although the seven-year freshness may be important, I will have used these batteries within the first couple of years. The price is good and if the battery lasts, I am satisfied.
92920
You are better off just getting a new one when needed because you have to be careful on how and where you store them. Best rule of thumb is to change them every 3 years with a fresh new battery.
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...
452217
Each box has a different expiration date based on when the batteries were made. The latest box i received were dated over 3 years in advance. I bought them in 2013 and the date stamped on the package is 2016. They may have an even longer shelf life but I use mine before the dates. I have been very pleased with the quality and have continued to purchase these batteries. Hope this helps answer your question.
164219
my pack has an expiration date of March 2021 printed on every battery - should be good to go for longterm storage - around here my kids will use them up long before then lol