What is the purpose of the 2 AA batteries? I'm concerned about their two-hour expected life.
798241
Honestly, when this product arrived, it looked flimsy. I either returned it or threw it away. It's not installed.
882093
Uncertain. A colleague of mine received two batteries and (knock on wood) they are still working fine. For now ... I have placed this in my lessons-learned folder labeled, "you get what you pay for". +++ Am in the process of returning them.
1125723
Well... I can't say how many charges they'll take, but the first two charges of mine have lasted over 20 hours (I think the first charge was around 30 actually) so I don't think you'll have to worry about them dying on you anytime soon... at least I hope not. If you're really worried, just go and get the older glasses that use watch/button batteries... that's the safest bet, I guess.
1925409
It could be labeled as 2AH.Smaller batteries such as these are traditionally labeled in mAh.
521559
4 AA batteries. Maybe it's 2 I don't remember. Either way there is a place in the case for spares.
534546
A hour or two. Very worthwhile. The price is cheap enough to have sufficient power to do the job. Don't plan on a quick recharge. Just have enough for the job. If the job is very long. You can recharge while the other batteries are working.
306985
I think I'll get two.These are only supposed to be good for roughly 300 cycles. That's not even a year of use if used 1x day.And, the batteries have been known to fail prematurely.
1554817
I have purchased two of these batteries and neither would hold a charge of between 1 and 2 hours. It should last 4 to 6 hours. It cost about $130 at Batteries Plus and less than $20 through Amazon. I guess you get what you pay for.
47948
Greetings, you place two AA batteries and recommend, is an excellent product.
1057289
I got somewhat less than 2 hrs (but I wasn't doing much other than moving the mouse to keep the screen from going to sleep) - about what I expected. This is a basic (6-cell) battery. there are extended (9-cell) batteries that will last longer. Also important to follow the "break-in" procedure (full charge - full drain - full charge, etc). Some laptops may have to "learn" how to charge a new battery before it can do it efficiently, and fully.
1252419
Imnot really sure but I think d a ys with lig h t to m o der a te use. It t akes an hour . Or two to recharge
1218375
I've had these batteries for almost a year. I have two pair so that I can switch out the used with freshly charged and immediately put the used on the charger. Because I have a spare pair (which I HIGHLY recommend) I don't pay close attention to the exact time but I would say it generally is about 2 hours when I go back and they are completely charged. A second pair is very affordable and you are always assured that you will have a fresh pair when needed. I got a second pair as many reviewers said these batteries were unreliable and die after a couple of uses. I have had none of those problems. If you need a more precise time, I will be happy to check that for you. I've had these batteries for almost a year. I have two pair so that I can switch out the used with freshly charged and immediately put the used on the charger. Because I have a spare pair (which I HIGHLY recommend) I don't pay close attention to the exact time but I would say it generally is about 2 hours when I go back and they are completely charged. A second pair is very affordable and you are always assured that you will have a fresh pair when needed. I got a second pair as many reviewers said these batteries were unreliable and die after a couple of uses. I have had none of those... » Read More I've had these batteries for almost a year. I have two pair so that I can switch out the used with freshly charged and immediately put the used on the charger. Because I have a spare pair (which I HIGHLY recommend) I don't pay close attention to the exact time but I would say it generally is about 2 hours when I go back and they are completely charged. A second pair is very affordable and you are always assured that you will have a fresh pair when needed. I got a second pair as many reviewers said these batteries were unreliable and die after a couple of uses. I have had none of those problems. If you need a more precise time, I will be happy to check that for you. « Show Less
1978521
From reading the Q&A;, the batteries die quickly or last two years. Such divergent answers tells you nothing. Which is really true?
1099056
Yep, you can use AA batteries (4). Will last a few days with moderate usage. We use these on our ATV's and this feature has saved me a couple of times.
1827652
They only draw 200 mAMPS (0.0000002 amps) so the wattage is really insignificant if you are worried about battery life. I am in road construction and normally leave mine running for 5-6 hours and have never had a problem. FYI: I run these at the same time I am running my overhead light (strobe) and four corner strobes.
976917
Yes, laptop batteries are not meant to last too long. 2 hours is about average.
1272029
Battery size two "AA". Not sure on duration. I try to use Energizer Advanced Lithium.