Since the batteries lose some charge with time, it is important how much exactly do you wait after the charging is completed, before theĭischarge commences.All batteries are tested in equal conditions, in an air-conditioned room, away from sunlight.For AA/AAA sizes, a coastdown discharge (termed „the last will“) at smaller current isĪlso employed after the main one, to evaluate the capacity after draining to complete flat. The batteries are discharged to 0.9V per cell.So Iĭischarge them in sets of four, to capture the performance of the complete set, not only the individual stats. Of these cells in electronic utilities employs several of them, meaning that the performance of the pack depends on the weakest of them. While the individual characteristics of each cell are also important, the typical usage AA/AAA cells are drained together in four-packs.Usually the place of purchase and the price is explicitly mentioned.
I test brand new alkaline batteries only, fresh from the store.For ease, I’ve listed the link for four batteries. Latest dealsĭuracell sells these batteries in packs of four, eight, 12 or 16, although the price per battery is similar across pack sizes. That makes them suitable for high-drain use, in items such as powerful torches and remote control kids toys. The tested capacity was higher than the rated capacity every time, showing the quality of the Duracell Rechargeable AA 2500mAh. As you can see from the graph, the batteries held up well, with little variance between the starting and ending charges. I then charged and discharged the batteries 50 times, taking measurements every 10 cycles. Initially, the charge was 2795mAh, which is a good deal higher than the rated capacity of the batteries. Next, I measured the capacity of the batteries using a high-drain test (600mA +/-20%, with a cut-off voltage of 0.94V). Voltage drops as the batteries are emptied of charge, although the voltage drop is lower for rechargeable batteries than alkaline non-rechargeable units. The Duracell Rechargeable AA 2500mAh measured in at 1.29V, which is a good starting point. First, I measured the starting voltage, which should be at least 1.2V for NiMH batteries. To test the batteries, I used an Ansmann Energy XC3000 battery tester. To compare, the GP ReCyko Charge 10 batteries only last 250 cycles when fast-charged, although they’ll last for 700 cycles if slow-charged. Given the price and that these are standard rechargeable batteries, that’s a decent number. This makes these units suitable for charging and leaving in a drawer, and even for lower-drain use in devices such as remote controls and clocks.ĭuracell says that these batteries can last for 400 recharges. These are low self-discharge batteries, which means that they’ll keep up to 80% of their charge over 12 months.
The Duracell Rechargeable AA 2500mAh performs well on all fronts, starting with a high overall capacity of 2500mAh. When it comes to standard NiMH rechargeable batteries, there are three things that you need to consider: the total number of charge cycles, their capacity, and how long they stay charged for. Well priced and offering a decent number of recharge cycles for entry-level batteries, these are a great choice if you need power and convenience. Perhaps better known for its disposable batteries, the Duracell Rechargeable AA 2500mAh batteries show that the company can also turn its hand to rechargeables.
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