I find that, when freshly charged, they are superb, giving lots of life and fast performance in the DSLR, which relies heavily on good battery power. They also charge fine, with no memory problems, in the Sony charger.
However, these batteries lose power when not in use. Most AAA rechargeables do, of course. But there are a new sort on the market that minimize the power drain when not in use. I have tried some, the eneloops.
They are just plain better than these Sony batteries. Eneloops fire right up and last longer even when they have not been in use for days or weeks. I find this makes a big difference because I don't have to recharge every time I start out a day with my camera.I've used these, Energizers, Duracells, etc. These have worked as well as any, and are often sold by Amazon at a very good price. Sony also makes a nice charger, the BCG-34HRMF4. When on sale, with 4 batteries, it's a great deal.
Be aware, though, that NiMH batteries all slowly lose their charge on the shelf, and will discharge in about a month or so, so don't use it for a device that sits around somewhere for long periods. These are my first rechargeable batteries, so all I can say is that in comparison to alkaline, these are WAY better and longer losting. Alkalines stop working in digital cameras long before they are actually used up, because they can't supply the required current for high-demand devices. These Sonys last much more than 4x as long because alkalines only work for a few minutes. These Sonys maintain their voltage at a stable level. I am using them in an Olympus C-755 digital camera, and I charge them using the Sony BCG-34HE4 charger. I can't say exactly how many pictures you can take on one charge, because they last for so long I lose track. If you have a digital camera, you absolutely must use rechargeable Nimh batteries. Don't waste your money on the expensive "high-end" alkalines or non-rechargeable lithium, etc. Also, you are doing the environment a favor by not using toxic landfill filler. I bought these rechargeable batteries for my digital camera. They loose power very quickly, even after fully charging them before use. My very old Panasonic rechargeable batteries last much longer than these new Sony batteries do. I will not purchase them again. Maybe they sent me some very out of date batteries.I mainly use these on my camera flash, i dont take lots of pictures with flash, but i think these are ok.
one thing i'm not happy is they are not low discharge, i placed them in my drawer, full charged while they are not being used. however, after a week or two, I will have to recharge them before use. I have purchased a number of the Sony brand rechargeable AA (and AAA) and find them to always do what they should do. Recharge and hold their charges for decent time frames. I have purchased other "no-name" AA batteries in the Nimh style, and been disappointed to say the least. One set "leaked" and the other set couldn't/wouldn't take a charge.These Sony rechargeables have really impressed me- Energizer sucks! I use the Energizer charger with these bad boys and I cannot seem to run out of power with my digital HD camera. It comes with (4) and I only use (2). I have to remember to rotate them. AWESOME!!!! I highly recommend this product. The silver/orange Cycle Energy batteries from Sony were Made in Japan. These newer grey cased batteries come from Chinese factories.Use these with my bike lights and they work quite well. Don't know how many hours of life I get out of them, but they haven't failed me yet. Do recommend carrying spare alkaline batteries with you if you absolutely need to make sure you can get to your location. I use these to help limit the junk I send for recycling and they are handy for the trips around town, where I am running later than expected. These batteries are performing as expected. They seemed to take a long time to initially charge, but they are functioning as expected and comparable to other mid-range rechargeable NIMH batteries. Las compre para los controles del WII. Hasta ahora están funcionando super bien. Muy buen precio. Tengo pilas recargables de otras marcas que ya no sirven, pero tengo otros juegos de pilas recargables sony y todavía funcionan perfectamente.
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