These cells have a self-discharge rate of about 2% per month on the higher end, but it’s often listed as 30% per year, even when the cell is idle. Its voltage ranges from 3.2V to 3.6V and its average capacity hovers at 3000mAh to 6000mAh. This dry cell has a diameter of about 18mm and a length of 65mm. All About 18650 Batteriesġ8650 batteries get their name from their physical proportions. And since the current flows so fast between them, your device could catch fire! Dropping or denting the cell can raise the risk of explosion, so be careful! And avoid mixing CR123A brands, since each manufacturer has slightly different specs and any inconsistencies could damage your gear. You might also overheat your CR123As if you use a new one with an old one. They have the same voltage as 18650s (3.2 to 3.7V), but if your maximum output is too low, the cell is likely to overheat. That first R means rechargeable, and these specialized CR123s have a capacity of 500mAh to 800mAh. Some brands do have them, and you’ll see them labeled RCR123. Once in a while, you might bump into a CR123A that claims to be rechargeable. The internal capacity is 1000mAh to 1500mAh, and it’s 16mm by 35mm. Regular AA, AAA, and D batteries hold 1.5V each, but CR123A cells carry 3V per cell. They work equally well in extreme heat and extreme cold, so it’s the ultimate off-grid cell. Another reason they’re so beloved is their versatility. These kinds of weapons are sometimes called tactical flashlights. The military loves them too – most batteries that are mounted on guns and rifles are CR123As. Because they can hold their charge for up to 10 years in storage, these batteries are popular among survivalists. Other brands call them EL123, SF123, or DL123, but the 123 is a constant marker. All About CR123A BatteriesĬR123A batteries are sometimes labeled as 123 cells or CR123 batteries. You get twice the power of AAs or AAAs for a fraction of their physical height. The main advantage of these two cell types is energy density. So you could say CR123As are primary batteries while 18650s are secondary batteries. These lithium cells are popular for flashlights and cameras.Īnother key variation is that lithium-metal cells like the CR123A are single-use cells while the 18650 lithium-ion is a rechargeable battery. CR123As and 18650s both have lithium in them, but CR123As are lithium-metal cells while 18650s are lithium-ion batteries. While lithium cells cost significantly more than metal oxide cells, they last a lot longer and can work in wintry weather and melting heat, so they can be beneficial for extreme temperatures. C123As are shorter while 18650s are longer. Visually, you can identify them by physical size. CR123A and 18650 batteries are both lithium-based batteries, but their functionality is slightly varied. And while most lithium cells are rechargeable, you can still find some that are single-use cells. This means they release electrons efficiently.Īs a result, lithium does an amazing job of producing electrical current. But in recent times, lithium batteries have become more popular because lithium has the highest electrochemical potential among the elements. These batteries are typically made from combinations of zinc, manganese, silver, nickel, or cadmium. You might be familiar with the usual sizes of dry cells – AAA, AA, and D. Protection and Safety Features on 18650s.
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