While the battery voltage remained very stable at each load current, there was a slight reduction with increased load. The impressive voltage regulation of the Tenavolts batteries also makes them more versatile over loads ranging from low (0.1A) to very high (2A). Our tester noted that the overall capacity of the Tenavolts batteries compares well with the Eneloop rechargeable and single-use Duracell alkaline batteries. The load current for this test was 0.35A, which was used as the load for the NiMH rechargeable (Eneloop) and single-use alkaline (Duracell) batteries. The measured capacity of the batteries is 1825mAh at 1.5V, which compares favourably to the rated capacity of 2775mWh (1850mAh). In this voltage vs current comparison, the Tenavolts' performance was superior to the NiMH and alkaline batteries.
Our tester, Carl Mihailovich, found some small variance over the life of the battery, but no more than 0.02V, which wouldn't be noticed in day-to-day use of the batteries. The batteries deliver a consistent 1.5V from fully charged to completely spent, providing the voltage required for some devices that need the best possible performance in heavy load discharge. The Tenavolts AA high-capacity rechargeable batteries are pre-charged up to 2775mWh, and are fully charged in a bit less than two hours, which is faster than the traditional quick charge NiMH rechargeable batteries which need at least three hours to be fully charged. The board is located within the battery cylinder under the negative terminal cap. However, a 3.7V to 1.5V voltage converter/voltage regulator circuit board allows the Tenavolts batteries to be used on devices that require standard AA batteries. Tenavolts batteries consist of a 3.7V/2.8Wh lithium-ion cell, which would make them incompatible with standard AA batteries. The kit includes four AA batteries, a charging cradle and small micro USB cable. If the voltage for a single battery drops during operation, which can happen for most alkaline and NiMH rechargeable batteries, then the aggregated effect can lead to an inability to power the device even if there's still energy left in the batteries.įor example, if a toy requires a certain amount of current to operate and the toy needs four or more batteries, then any drop from the 1.5V you can get from a single-use alkaline battery to the 1.2V you can get from a rechargeable NiMH battery leads to a quick drop in your ability to power the toy. If the battery can maintain a consistent voltage, then the current or flow rate remains the same for the life of the battery. Think of voltage as the water pressure supplied to the pipe while the current (measured in amps or mAh) is the flow rate. A simple analogy to understand the two components is to imagine water moving through a pipe. The two most important things to consider in a battery are voltage (volts) and current (amps).
Rechargeable aa batteries 1.5 volt full#
Tenavolts AA lithium rechargeable batteries deliver 1.5V from the moment you put them in the device until they stop, and they can then be recharged to full capacity in just under two hours. But the inability for traditional NiMH (nickel metal hydride) batteries to reach the voltage of a single-use alkaline battery at 1.5V or even maintain their 1.2V level for the operating life of the battery is an issue for some, particularly if you're powering devices that house four or more AA or AAA batteries. If used well, rechargeable batteries are an undeniably better environmental option compared to single-use alkaline batteries.
With a faster charge time than regular rechargeable batteries (we clocked it at just under two hours), the Tenavolts battery pack could be a good option if you find your existing rechargeable batteries aren't powering your devices like they used to or are powering them for shorter periods than you'd like. This means they can power high-drain devices for longer periods compared to your standard single-use alkaline and NiMH rechargeable batteries. From the moment you put them in the device until the batteries are spent, Tenavolts rechargeable AA lithium batteries deliver a consistent current at around 1.5V.
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