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https://www.enhcb.com/products/cr14250-li-mno2-cylindrical-battery.html

1/2AA Spiral CR14250 Li-MnO2 Battery 600mAh Primary Lithium Manganese Dioxide Batteries, Glass To Medical Devices Non-rechargeable Gas Meter NB-IoT Meter.

CR14250 Lithium Manganese Dioxide Battery Advantages
High voltage response, stable during most of the lifetime of the application

Energy density up to 830Wh/L

Wide operating temperature range (-40℃~+85℃)

Low self-discharge rate (less than 1% per year after 1 year of storage at +25℃)

CR14250 Battery Specification
Electrical characteristicsOpen circuit voltage (at 23±2°C)≥3.10V
Nominal capacity600mAh
(At +25°C, the battery discharged at continuous current 1mA until the voltage reaches cut-off voltage 2.0V. The capacity can vary at a different temperature, discharge current or cut-off voltage.)
Maximum continuous current500mA
(At +25°C, 2.0V cut-off, battery discharged for minimum 50% of rated capacity.)
Maximum pulse discharge current1000mA
(At +25°C, 2.0V cut-off, battery discharged for minimum 50% of rated capacity with max pulse for 3 seconds after 27 seconds break. The discharged capacity may vary according to the pulse characteristics, the temperature, and the cell’s previous history. Fitting the cell with a capacitor may be recommended in severe conditions, consult HCB.)
Storage (recommended)≤+30°C
(For more severe conditions, consult HCB)≤75%RH
Operating temperature range-40°C~+85°C
(Operation above ambient temperature may lead to reduced
capacity and lower voltage readings at the beginning of pulses, consult HCB.)
Physical characteristicsWidth14.0±0.2mm
Height25.5±0.5mm
Typical weight10.0g
Li metal content0.22g

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