Not sure what protection is built-in to these cells, but it better be pretty dang robust. Since almost all battery sellers state battery capacity in “mAh”, milliamp-hours, one might question the integrity of a seller that uses a different unit measurement to make their battery capacity sound better. 1000 milliwatt-hours, at 1.5-volts, equals only about 667 milliamp-hours. What many shoppers don’t realize is that “mWh” (milliwatt hours) and “mAh” (milliamp hours) are not measuring the same thing. Other folks have pointed out the incorrect claim that this cells capacity of 2800mWh matches the Eneloop Pro, which lists a capacity of up to 2550mAh. The downside is that you will be throwing away $3 to $4 worth of disposable batteries each time they run down. In some flashlights, for example, the light output will be brighter with the 6-volt supply of the two CR123A cells.
Aa lithium batteries series#
Two CR123A batteries in series will supply a total of 6 volts, while a single 16650 (or an 18650) will supply only 3.7 volts. An important issue is the difference in output voltage. The 18650 has a larger diameter than the CR123A, but the article fails to point out that you can get a 16650 rechargeable Li-ion battery that will fit the same enclosure as two (disposable) CR123A batteries stacked end-to-end. This article states that a single 18650 battery can replace two CR123A batteries, but that is not exactly correct. Some small flashlights are designed to use AA cells at 1.2-volts (NIMH) to 3.7-volts (14500 Li-ion). There is a 14500 rechargeable Li-ion cell that matches the physical dimensions of a AA cell, but it outputs 3.7 volts which may be too high for some devices. If you have a device that doesn’t perform well with the lower 1.2 volt supply, then this rechargeable Lithium-Ion AA technology may be a welcome replacement for disposable conventional 1.5 volt cells. The most important difference is that these cells output 1.5 volts, like conventional AA cells, while nickel-metal-hydride cells provide only 1.2 volts. It would appear that NIMH rechargeable cells are better than these for most applications, given their higher capacity and lower cost. So to compare these with other batteries, you need to divide by the voltage, which for li-ion is 1.5, giving a capacity in mAh of 1.87 mAh (2800/1.5) – the Eneloop Pros are rated at 2.55 mAh so this is a massive difference in battery life…Īrguably it makes more sense to describe battery capacity in mWh than mAh, as now we have so many different battery technologies all with different voltages so similar mAh values may not be equivalent, I can’t help but think this is a deliberate ploy by battery companies to mislead – and it works! You are so not the only person to be caught by this… If you look closely you will see that they all state power capacity in mWh (Miliwatt hours) and not, as is traditional and used in the case of all primary batteries and rechargeables like NiMH & NiCd, in mAh (milliamp hours). I think you have been fooled by the deliberately misleading labelling that all the new li-ion battery manufacturers are using.
Aa lithium batteries pro#
In this article you say that the Kentli Li-ion matches the Keneloop Pro in power output. There is currently no standard size for these lithium-ion cells. There are also numerous other types of lithium-ion batteries made for specific laptops and other electronics gadgets.
See our article on The Best 18650 Batteries for more information. Most modern tactical LED lights are designed to use a single 18650 or two CR123As, but it’s best to check before buying. However, the 18650 is a wider cell and will not fit into a flashlight that is designed strictly for the narrower CR123As. There are also some lithium-ion rechargeable batteries made for high-performance flashlights and cameras, in these sizes: 18650 and CR123.Ī single 18650 battery can replace two CR123A batteries, although at a lower voltage (but much higher amperage). Additionally, lithium-ion cells are lighter than NiMH cells.
The batteries have a capacity of 3400mWh which matches Eneloop Pro (NiMH batteries with the highest capacity). The circuitry inside the cells reduces the voltage to 1.5 volts. Lithium-ion batteries normally operate at 3.7V per cell.
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