The manufacturer states that are pre-charged, so the first I test, how much they are pre-charged :). Type 3 - Sanyo Eneloop, Sold as 2000 mAh / 1800 cycles. They look little better, but after measuring only 706 - 764 mAh I recognized it is also no use. They were able to take a lot of pictures because of their low internal resistance.) I remember that in my first digital camera, I used quality 600mAh NiCd and even with such a low capacity capacity 750mAh by itself wouldn't be so bad. digital cameras) reports dead battery very soon. The problem is not only to their low capacity but also in a high internal resistance.īecause of it, high current-consuming appliances (eg. The most poor ones even have a hollow part. On the market there are no-name batteries, and also counterfeits of good brands. You can tell such a difference just by holding them in your hand. Good AA rechargeable batteries weighs around 25-30 grams. I pointed to an interesting dependence: the heavier, the better. Besides measuring the capacity of the battery I also measured their weighed. Such as lifetime (number of cycles), self-discharge, and immunity to deep discharge etc. There are also 2500 mAh, but the 25% extra capacity is achieved at the expense of other parameters, Quality rechargeable AA batteries usually have 2000 mAh. Declared capacity often is technically not possible (3000mAh, sometimes even 3800mAh in AA size). It seems that the larger the quoted capacity, the lower the real :). NiCd rechargeable batteries relabeled as NiMH (!). It seems that the market is flooded with fakes,Ībsolutely useless counterfeits, whose manufacturers declare any capacity thay want. ESR (internal resistance) is vice versa several times higher than it should be. It turned out that the accumulators are definitely not worth the money even with theĬheapest NiMH have up to 15x less actual capacity than the nominal I focused onįor testing, I used my Battery capacity meter. I decided to test some batteries available on the market (especially ebay) and find out the truth about their parameters, especially the capacity :). In fact, I've found that the Powerowl batteries tend to outperform name-brand rechargeables in both charging time and performance.Beware of fake NiMH rechargeable batteries But if you're looking for a dependable set of rechargeable batteries that includes a handy charger, you can't beat this deal. Of course, your mileage may vary, depending on usage. From my battery experience, that's outstanding service.Īlso: Dead gadget battery? This $6 tool is a must-have for tech repairs My wireless mics can really drain batteries fast but I've been able to achieve roughly four hours of filming on a single charge. The amount of time the batteries will last on a full charge depends on what they are being used for. The charger can charge one or all eight batteries simultaneously.Includes eight batteries, charging dock, and USB cable.2800mAh high-capacity, low self-discharge Ni-MH batteries for long life.Overcharge and short-circuit protection.Input: DC 5V 2A Output: DC 1.4V 250mAh AA / 1.4V 250mAh AAA.Indicator light - red is charging, green is charged, green blinking means battery is damaged, and orange means input voltage is too low.Storage temperatures - from 14 degrees F to 104 degrees F.Working temperatures - from 14 degrees F to 113 degrees F.Achieve a full charge (for nearly spent batteries) in 6-8 hours.Can be recharged over 1,200 times, while retaining 70% charge after non-use (for up to three years).If you see inaccuracies in our content, please report the mistake via this form. If we have made an error or published misleading information, we will correct or clarify the article. Our editors thoroughly review and fact-check every article to ensure that our content meets the highest standards. Our goal is to deliver the most accurate information and the most knowledgeable advice possible in order to help you make smarter buying decisions on tech gear and a wide array of products and services. ZDNET's editorial team writes on behalf of you, our reader. Indeed, we follow strict guidelines that ensure our editorial content is never influenced by advertisers. Neither ZDNET nor the author are compensated for these independent reviews. This helps support our work, but does not affect what we cover or how, and it does not affect the price you pay. When you click through from our site to a retailer and buy a product or service, we may earn affiliate commissions. And we pore over customer reviews to find out what matters to real people who already own and use the products and services we’re assessing. We gather data from the best available sources, including vendor and retailer listings as well as other relevant and independent reviews sites. ZDNET's recommendations are based on many hours of testing, research, and comparison shopping.
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