Product advantages:
High density,high capacity,low self-discharge rate,wide range of working temperature (-55~+85 degrees C),good durability

Range of application:
CNC machine tools,server,programmer,PLC,CNC,injection molding machine,printing machine,screen,ammeter,water meter,real-time clock,back-up memory power,all kinds of measuring instruments,special electronic equipment.

Other Panasonic battery:
BR-2/3A
BR-2/3AG
BR-2/3AGCT4A
BR-A
BR-AG
BR-AGCF2W
BR-C
BR-CCF2TH
BR-E5C5A

Other Brand Batteries:

Panasonic 
BR-2/3A 1200mAh 2.5mA 17X33.5mm 13.5g
BR-2/3AG 1450mAh 2.5mA 17X33.5mm 13.68g
BR-2/3AGCT4A 2400mAh 2.5mA 34X33.5mm 55g
BR-A 2400mAh 2.5mA 17X45.5mm 18g
BR-AG 2200mAh 2.5mA 17X45.5mm 18g
BR-C 5000mAh 5mA 26X50.5mm 42g
BR-AGCF2W 1200mAh 2.5mA 17.5*33.5mm 13.5g
BR-CCF2TH 5000mAh 5mA 52X50.5mm 102g (6V)

BR-E5C5A 1200 mAh  (3V)

Toshiba 
ER3V/3.6V /14.5x30.5mm/ 1000mAh /8.5g
ER4V/3.6V /14.5x35.5mm/ 1200mAh /10g
ER6V/3.6V 14.5x47mm / 2000mAh /16g
ER17330V/3.6V /17.0x35mm / 1700mAh /13g
ER17500V/3.6V /17.0x53mm /2700mAh /20g
ER6VC119A 3.6V/14.5*50.5/2000mah/16g

ER6VC119B3.6V/14.5*50.5/2000mah/16g

 Sanyo
CR17335E-R 1800mAh 17.0 x 33.5mm
CR17450E-R 2500mAh 17.0 x 45.0mm
CR14250SE 850mAh 14 x25.0mm/3V
CR12600SE 1500mAh 12.0 x60.0mm
CR17335SE 1800mAh 17.5 x33.5mm
CR17450SE 2500mAh 17.0 x 45.0mm

CR17450E-R-2-CN10 2200mah 17*45mm

 Maxell

ER17/50/17x50.5mm/2750mAh/20g
ER17/33/17x36.2mm/1600mAh/13g
ER6/14x5mm/1800mAh/15g
ER6C/14.5x50.5mm/1800mAh/15g
ER3/13.9x24.7mm/1100mAh

ER6B/14.5x50.5mm/1900mAh/15g

FDK

CR 6.L/14.5*50.5mm/2300mah/17g/3V

CR8.LHC/17*45mm/2600mah/21g/3V

CR23.8L/17945mm

CR12600SE/60*121500mah

CR14250SE/1200mah/3V

CR17335SE/1800mah/3V

CR17450SE/17*45mm/2500mah/3V