Specification
Brand: PKCELL
May also be known as: 1616, CR1616, DL1616, ECR1616, BR1616, CR 1616, 1616H, 280-209, DL1616B, BR1616-1W, CR1616-1W, KCR1616, LM1616, 5021LC, L11, L28, YA, CD1616.
Model: CR1616 Lithium Battery
Capacity:50mAh
Volt: 3V
Chemical Composition: Lithium
Shelf Life: 5 years (not printed on battery)
Diameter:About  16mm / 0.62"
Height:About 1.6mm / 0.06"
Conversion : 1mm = 0.0393 inch
Application: Car remote control, car key fob, calculator, craftsman remote control, laser light, blood glucose tester, casio G-shock watch, camera, watch, clock, electronic organizer, PDA, portable electronics, keyless entry remote control, mobile phones, computer motherboards, heart monitors, backup power for IC memory, garage door openers, toys, LED lights, games, MP3 players, digital recorders, doorbells, sporting goods, calorie counters, stopwatches, blood glucose meters, electronic notebooks, thermometers , mobile games, car security alarms, computer equipment (memory backup battery) CMOS, tea lights, candles, home security systems, alarm systems and so on

Note: 
A: Some customers are confused about model number. 
Different callings. For example, CR2032 is also called 2032 or ECR2032 or DL2032. Actually they are the same.
B: Sometimes we hear from customers that they bought wrong size for their devices. 
That's very understandable. Because those button cells are very small and look very very similar from pictures.
Voltage are all 3V. Material are all Lithium. The differences are dimensions.
Tip: The battery is named by dimension!  

CR2032   20(D)*3.2(H)mm

CR1616   16(D)*1.6(H)MM

DataCaciques