![]() Nickel Zinc (NiZn) AA rechargeable batteries feature nominal voltage of 1.6-1.65 volts and capacity in the 1500-1800 mAh range.Īs such, NiZn AA batteries are backward compatible with 1.5V AA batteries, at least in most devices. Nickel Zinc (NiZn) Rechargeable AA Batteries Thanks to general compatibility with 1.5V Zinc-Carbon and Alkaline batteries, NiMH batteries are commonly used instead of non-rechargeable AA batteries in toys, tools, medical instruments, photo equipment, etc. NiMH batteries support more charging/discharging cycles than NiCd batteries and they generally don't suffer from memory effect, at least not as much as NiCd batteries.Īlso, new NiMH batteries feature a very low self-discharge rate, allowing them to be stored for up to a year without adverse effects on their performances. Nonetheless, they should be recycled properly. NiMH AA batteries are environment-friendly batteries since they don't contain mercury, cadmium, lead, and other toxic and dangerous pollutants. The main reason for a broad capacity range is that some NiMH batteries are optimized for high-discharge applications and some for high-capacity but low discharge current applications. ![]() Nickel Metal-Hydride (NiMH) rechargeable AA batteries feature a nominal voltage of 1.2V and capacity in a rather broad range of 700-2800+ mAh. Nickel Metal-Hydride (NiMH) Rechargeable AA Batteries ![]() In most applications, 1.2V NiCd batteries are replaced by environment-friendly 1.2V NiMH batteries, but they are still, nonetheless, used in some toys and cordless tools. NiCd AA batteries are still used in various toys and tools that require strong currents.Īlso, NiCd AA batteries can replace 1.5V non-rechargeable AA batteries in toys and devices that tolerate somewhat smaller voltage - after all, a cutoff voltage of Zinc-Carbon and Alkaline batteries is lower than the nominal voltage of NiCd AA batteries. Also, they suffer from strong memory effect - it is highly recommended to periodically discharge them completely and then to recharge them completely. NiCd AA batteries feature a nominal voltage of 1.2 volts and an average capacity of 600-1000 mAh. Nickel Cadmium (NiCd) rechargeable AA batteries are an older type of rechargeable batteries, slowly being phased out due to the use of toxic cadmium. Seriously! Nickel Cadmium (NiCd) Rechargeable AA Batteries Using the wrong battery charger may cause the battery to overheat, catch fire or even explode. But, more on that later in this article.Īlso, all rechargeable batteries should be recharged with battery chargers intended for such battery chemistry. Note: Lithium 1.5V rechargeable AA batteries feature lithium-ion battery combined with small DC-DC inverter which lowers output voltage from 3+ volts down to very constant 1.5 volts, making such batteries backward compatible with older 1.5V Carbon-Zinc and Alkaline batteries. Lithium-Ion chemistry (IMR, IFR, ICR, INR). The following comparison table lists some of the most popular AA and 14500 battery chemistries with their most important features and specifications:Īs one can see, the most common rechargeable AA battery chemistries include: ![]() It is important to note that historically, AA batteries were non-rechargeable batteries featuring nominal voltage of 1.5 volts and Zinc-Carbon and Alkaline chemistry, while 14500 batteries were and still are rechargeable lithium batteries featuring 3.2-3.7 volts and various lithium chemistries. ![]() AA and 14500 Battery Dimensions and FeaturesĪA batteries feature physical dimensions of (D x H) 14.5 x 50.5 mm, while 14500 batteries feature physical dimensions of (D x H) 14.0 x 53.0 mm. While non-rechargeable AA batteries feature nominal voltage of more or less constant 1.5 volts, rechargeable AA batteries feature nominal voltage of 1.2 to 3.7 volts, and are offered in a large number of chemistries, raising various questions, among others, which rechargeable AA battery is compatible with non-rechargeable AA batteries?įortunately, with the advancements in chemistry and batteries in general, the advancements in electronics lead to more and more devices accepting batteries with different voltages, which is great but should be done only when explicitly allowed by the device's manufacturer. NiCd, NiMH, and Lithium Rechargeable AA BatteriesĪA batteries are some of the most popular battery types commonly used in a broad range of devices, tools, toys, and other applications. ![]()
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