DATAMATH  CALCULATOR  MUSEUM

BAT - Batteries

The first Texas Instruments calculator, the Datamath, used rechargeable NiCd (nickel-cadmium) batteries. They were soldered together and firmly mounted inside the calculator housing. Later the people at TI changed the housing and added a trap door. From this time customers could either use standard alkaline AA-sized cells or rechargeable batteries of the same size.

With the introduction of C-MOS technology later in the 1970s, power consumption was reduced dramatically and the designers opted for smaller batteries and even button cell alkaline batteries. In the Datamath Calculator Museum we refer to the IEC (International Electrotechnical Commission) code of the batteries but quite often the brand names differs from that. We compiled a list of common calculator batteries with some technical specifications and cross-reference information for your convenience:  

Name Type Voltage Capacity Height Diameter Weight Alternatives
AAAA Alkaline 1.5 V 595 mAh 42.5 mm 8.3 mm 6.0 grams MN2500
AAA Alkaline 1.5 V 1100 mAh 44.5 mm 10.5 mm 11.5 grams LR03, AM4, MN2400
AA Alkaline 1.5 V 2600 mAh 50.5 mm 14.5 mm 23.0 grams LR06, AM3, MN1500
C Alkaline 1.5 V 7800 mAh 50.0 mm 26.2 mm 61 grams LR14, AM2, MN1400
D Alkaline 1.5 V 16500 mAh 61.5 mm 34.2 mm 134 grams LR20, AM1, MN1300
N Alkaline 1.5 V 1000 mAh 30.2 mm 12.0 mm 11.0 grams LR1, AM5, MN1900
9-Volt Alkaline 9.0 V 500 mAh 48.5 mm 27*18 mm 46 grams 6LR61, AM6, MN1604
               
LR41 Alkaline 1.5 V 35 mAh 3.6 mm 7.9 mm 1.0 grams Ucar 192, G3A
LR43 Alkaline 1.5 V 80 mAh 4.2 mm 11.6 mm 1.6 grams Ucar 186, RW 84
LR44 Alkaline 1.5 V 115 mAh 5.4 mm 11.6 mm 1.8 grams Ucar 157/A, RW 82
LR54 Alkaline 1.5 V 50 mAh 3.0 mm 11.6 mm 1.1 grams LR1130, Ucar 189, RW 89
LR55 Alkaline 1.5 V 25 mAh 2.1 mm 11.6 mm 0.8 grams LR1120, Ucar 191, RW 80
                   
SR41  Silver-oxide  1.5 V 42 mAh 3.6 mm 7.9 mm 1.0 grams S736, V392
SR44  Silver-oxide  1.5 V 175 mAh 5.4 mm 11.6 mm 1.8 grams S76, V357
                   
CR1216 Lithium 3.0 V 25 mAh 1.6 mm 12.5 mm 0.7 grams BR1216
CR1220 Lithium 3.0 V 35 mAh 2.0 mm 12.5 mm 0.8 grams  
CR1616 Lithium 3.0 V 55 mAh 1.6 mm 16.0 mm 1.2 grams BR1616
CR1620 Lithium 3.0 V 60 mAh 2.0 mm 16.0 mm 1.2 grams DL1620
CR2016 Lithium 3.0 V 90 mAh 1.6 mm 20.0 mm 1.8 grams DL2016, LF-1/4V
CR2025 Lithium 3.0 V 170 mAh 2.5 mm 20.0 mm 2.5 grams DL2025
CR2032 Lithium 3.0 V 230 mAh 3.2 mm 20.0 mm 3.0 grams DL2032, LF-1/2V
CR2320 Lithium 3.0 V 135 mAh 2.0 mm 23.0 mm 2.9 grams BR2320
CR2420 Lithium 3.0 V 135 mAh 2.0 mm 24.0 mm 3.0 grams LF-1/3W
CR2430 Lithium 3.0 V 280 mAh 3.0 mm 24.5 mm 4.0 grams DL2430 
CR2450 Lithium 3.0 V 560 mAh 5.0 mm 24.5 mm 6.2 grams   
                  
 LR1 Alkaline 1.5 V mAh 12.0 mm 30.2 mm 10.0 grams MN9100, LR1A

 Fineprint: This list was compiled carefully but we are not responsible if someone destroys his calculator due to informations of it.

 

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If you have additions to the above article please email: joerg@datamath.org.

© Joerg Woerner, October 3, 2008. No reprints without written permission.