CR2 Battery Equivalents and Replacements - CR2 Battery vs 15270 Battery
CR2 batteries are very popular cylindrical non-rechargeable 3.0V lithium batteries, commonly used in various devices like photo cameras, golf rangefinders, weapon mounted lights, tactical and EDC flashlights, security devices etc.
15270 (15266) batteries are rechargeable lithium batteries with nominal voltages between 3.0 and 3.7 volts, depending on the exact chemistry types and built in Battery Management System (BMS). Since they are very similar in dimensions with CR2 batteries, they are often labeled as 'rechargeable CR2' batteries.
CR2 Battery Features and Specifications
CR2 battery is non-rechargeable lithium battery with the nominal voltage of 3.0 volts and the cutoff voltage of 2.0 volts.
Physical dimensions of CR2 battery are 27 mm (~1.063 inches) in height and diameter of 15.6 mm (~0.59 inches). Typical capacity of CR2 battery is in the 600 and 800 mAh, although actual capacity depends on the cutoff voltage of particular device.
When labeling their batteries, many manufacturers use 'standard' label of CR2, but also add a letter or two to emphasize the brand, for example.
CR2 battery equivalents are commonly labeled as 1CR2, DL-CR2, DLCR2, 5046LC, CR15H270, EL1CR2, KCR2, etc.
CR2 batteries are typically manganese-dioxide lithium 15.6 x27 mm non-rechargeable cylindrical batteries, with carbon-monofluoride lithium 15.6x27 mm non-rechargeable cylindrical batteries being very rare.
Shelf life of CR2 batteries depends on the model and the brand, but it is typically 3+ years, with some brands having 10+ years shelf life batteries, which tend to be slightly more expensive, but are highly recommended for standby device or emergency devices (panic lights, EDC flashlights, medical equipment etc.).
CR2 batteries are fairly common and are offered by most reputable brands and getting a good ones from online shops and stores shouldn't be a problem.
CR2 vs 15270 (15266) Battery
Standard CR2 battery is non-rechargeable lithium 3.0 volts battery and it is slightly larger than 15270 (15x27 mm) or 15266 (15x26.6 mm).
Due to their very similar dimensions, most manufacturers label 15266 batteries as 15270 batteries and vice-versa.
Note: '15270 battery' is typical label for rechargeable lithium battery 15 mm in diameter and 27 mm in height.
15270 batteries come in many versions depending on the chemistry, nominal voltage, BMS etc.
Typical 15270 chemistries include:
- IMR 15270 batteries feature LiMn204 (Lithium Manganese Oxide) chemistry. Their nominal voltage is in the 3.6 - 3.7 V per cell range, with maximum recommended charging voltage of 4.2 V. IMR batteries commonly have lower capacity, but are capable of delivering larger currents and are commonly used for high drain devices (10-20C or more).
- INR 15270 batteries feature LiNiMnCoO2 (Lithium Manganese Nickel) chemistry. These batteries are very similar to IMR batteries, since they can provide plenty of currents, with slightly lower capacity.
- IFR 15270 batteries feature LiFePO4 (Lithium Iron Phosphate) chemistry. Their nominal voltage is 'only' 3.2 - 3.3 V per cell, with the maximum recommended charging voltage of 3.5 - 3.6 V. LiFePO4 chemistry is one of the safest lithium rechargeable chemistries.
- ICR 15270 batteries feature LiCoO2 (Lithium Cobalt Oxide) chemistry. Their nominal voltage is in the 3.6 - 3.7 V per cell range, with the maximum recommended charging voltage of 4.2 V. They commonly have higher capacities, but maximum allowed currents are often limited to just few C.
Note: there are other chemistries on the market too, including hybrid technologies like: Lithium Nickel Cobalt Oxide (LiNiCoO2), Lithium Nickel Cobalt Aluminum Oxide (LiNiCoAlO2), etc. Most common 15270 batteries use LiFePO4 (Lithium Iron Phosphate) or LiMn204 (Lithium Manganese Oxide) chemistry.
Obviously, typical 15270 voltages depend on the chemistry type and they vary from 3.2 to 3.7 volts. This 0.2 to 0.7 volts difference doesn't appear significant, but certain electronic devices might not operate properly because of such voltage differences.
Since rechargeable lithium batteries are not nearly as safe as non-rechargeable lithium batteries, they often feature Battery Management System (BMS) that protects the battery from events like overcharging, over-discharging, overheating, and similar.
Also, to make 15270 batteries fully compatible with non-rechargeable CR2 batteries, some Battery Management Systems lower output voltage to 3.0 volts.
On the other hand, having builtin Battery Management System means that the battery's capacity is lower and instead of having 600-800 mAh, 'protected' 15270 typically feature 400-600 mAh capacity.
Long Story Short: CR2 batteries are popular non-rechargeable batteries, offered by many reputable brands. With good capacity and excellent shelf life, CR2 batteries are commonly used in medical and military devices, but also in the flashlights, photo cameras and similar.
15270 batteries are often considered as 'rechargeable CR2' batteries and can save plenty of money, just be sure to charge them using chargers designed for such batteries.