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Celebrating the independent kiwi spirit of invention.


Research Topic: Which Battery Will Do?

 
Last updated:  

Overview & Terms
8 March 2012
Single Use
7 January 2016
Rechargeable
1 September 2013
Battery Analyser
21 November 2017
Battery Shopping
12 May 2018

Recommended Batteries
for Particular Uses

16 May 2014

 

Original article by Ian Mander, 22 July 2002

Single Use Test
6 November 2007
Rechargeable Test
8 January 2019
Test Procedure
4 June 2011
Button and Coin Cell Shopping
12 October 2018
More Info & Links
29 February 2012
  LSD Shootout
7 January 2016
When Battery Testing
Goes Bad –
Consumer Magazine

2 October 2017
Battery Holder Shopping
3 December 2017

Safety note

Button and coin cells must be kept away from young children who might swallow them. See this article for more information about the hazards.

Shopping for button and coin cells

These are available inexpensively online, if you don't mind waiting for international shipping. Silver oxide cells (SR...) have more capacity than alkaline cells (LR...), have a nominal voltage slightly higher (1.55V instead of 1.5V) and are also more expensive. Zinc air cells are most often used for hearing aids.

Watch battery notes

  • The W on the end of an SR number (eg, SR626SW) means it's specifically designed for watch use – it meets the international IEC 60086-3 standard for watch batteries.
  • An S in the suffix (eg, ...SW) means it uses sodium hydroxide for the electrolyte, which Energizer says is suitable for continuous low drain devices, such as watches (source – Energizer silver oxide application manual).
  • Less common is a P suffix (eg, ...PW), which means potassium hydroxide electrolyte, suitable for continuous low drain with periodic high drain pulse demands, or "high drain" (eg, watches with alarms, backlights, calculators, etc).
  • The potassium hydroxide cells are harder to seal and thus have less salt resistance.
  • Just a W suffix does not necessarily indicate either low drain or high drain, but for at least some companies including Maxell and Renata it means high drain. Sadly, resellers are very likely to get mixed up, so if you want a particular type, be careful.
  • Low drain/high drain does not mean low capacity/high capacity. A Renata 395 (SR927SW, low drain) is 55 mAh, a Renata 399 (SR927W, high drain) is 53 mAh. (Source – Renata datasheet.)
  • For most uses it probably doesn't matter.

The cells in this table are listed by size, diameter first. Often a thicker or thinner cell will fit.

Remember to check how many you need – some watches take two cells.

Alkaline Cell Type
1.5 V
Otherwise Known As
(equivalent silver oxide versions)
Typical Capacity
(equivalent silver oxide versions)
Dimensions
(ø = diameter)
  (337, SR416SW, SR416SW) (8 mAh) 4.8 mm ø × 1.6 mm
  (335, SR512SW, SR512SW) (6 mAh) 5.8 mm ø × 1.2 mm
  (317, SR516SW) (11 mAh) 5.8 mm ø × 1.6 mm
AG0 LR521, LR63
(379, SR521, SR521SW, SR63)
10 mAh
(18 mAh)
5.8 mm ø × 2.1 mm
AG1X G1X, LR616
(SR616, SR616SW, SR65, V321, 616)
10 mAh
(15 mAh)
6.8 mm ø × 1.6 mm
AG1 LR60, LR621, 164
(SR60, SR621, SR621SW, 364)
13 mAh
(20 mAh)
6.8 mm ø × 2.1 mm
AG4 LR66, LR626, 177
(SR66, SR626, SR626SW, 377, 377S)
12-18 mAh
(26 mAh)
6.8 mm ø × 2.6 mm
  315
(SR67, SR716SW)
 
(21 mAh)
7.9 mm ø × 1.65 mm
AG11 LR58, LR721, 162
(SG11, SR58, SR721SW, 361, 362)
18-25 mAh
(33-36 mAh)
7.9 mm ø × 2.1 mm
AG2 LR59, LR726, 196
(SG2, SR59, 396, 397)
25-26 mAh 7.9 mm ø × 2.6 mm
AG3
LR41, LR736, 192
(SG3, SR41, SR726, 384, 392)
25-32 mAh
(38-45 mAh)
7.9 mm ø × 3.6 mm
AG5 LR48, LR750, LR754, 193
(SG3, SR48, 309, 393, 398)
52 mAh
(70 mAh)
7.9 mm ø × 5.4 mm
AG6 LR69, LR920, LR921, 171
(SR920, SR920SW, SR921, 371)
30 mAh
(55 mAh)
9.5 mm ø × 2.1 mm
AG7 G7, LR57, LR926, LR927, 195
(SR57, SR927, SR927SW, SR927W, 395, 399)
46 mAh
(67 mAh)
9.5 mm ø × 2.6 mm
AG9 LR45, LR936, 194
(394)
48 mAh 9.5 mm ø × 3.6 mm
AG8 LR55, LR1120, LR1121, 191
(381, 391)
40-42 mAh 11.6 mm ø × 2.1 mm
AG10 LR54, LR1130, LR1131, 189
(SR54, SR1131, 389)
44-68 mAh
(80-86 mAh)
11.6 mm ø × 3.1 mm
AG12 LR43, LR1142, 186, CX186
(SR43, SR1142, 386)
80 mAh
(120 mAh)
11.6 mm ø × 4.2 mm
AG13 LR44, LR1154, A76, 76A
(SR1154, SR44, S76)
110-150 mAh
(170-200 mAh)
11.6 mm ø × 5.4 mm
Lithium Cell Type
3 V
Otherwise Known As Typical Capacity Dimensions
(ø = diameter)
CR927   30 mAh 9 mm ø × 2.7 mm
CR1025 5033LC 30 mAh 10 mm ø × 2.5 mm
CR1130   70 mAh 11.6 mm ø × 3.0 mm
CR1216 5034LC 25 mAh 12.5 mm ø × 1.6 mm
CR1220 5012LC 35-40 mAh 12.5 mm ø × 2.0 mm
CR1225 5020LC 50 mAh 12.5 mm ø × 2.5 mm
CR1616 (Sony)
CR1616 (Panasonic)
  50-55 mAh 16 mm ø × 1.6 mm
CR1620 (Sony)
CR1620 (Panasonic)
5009LC

60 mAh is common
good ones are
75-78 mAh

Maxlife brand does not last well

16 mm ø × 2.0 mm
CR1625     16 mm ø × 2.5 mm
CR1632   140 mAh 16 mm ø × 3.2 mm
CR2016 5000LC 90 mAh 20 mm ø × 1.6 mm
CR2025 (Panasonic)
CR2025 (Sony)
CR2025 (Sony)
5003LC 160-165 mAh 20 mm ø × 2.5 mm
CR2032 (Sony)
CR2032 (Sony)
5004LC 200-225 mAh 20 mm ø × 3.2 mm
CR2430 5011LC   24 mm ø × 3.0 mm
CR2450 5029LC, CR2450B (Sony) 610-620 mAh 24 mm ø × 5.0 mm
CR2477   950-1000 mAh 24 mm ø × 7.7 mm
Rechargeable Lithium Cell Type
3.6 V
Otherwise Known As Typical Capacity Dimensions
(ø = diameter)
LIR2032   40 mAh 20 mm ø × 3.2 mm
Zinc Air Cells
1.4 V
Otherwise Known As Typical Capacity Dimensions
(ø = diameter
A10 AC10, DA230, PR70, ZA10, yellow tab 90 mAh 5.8 mm ø × 3.6 mm
A312 AC312, DA312, PR41, ZA312, brown tab 160 mAh 7.9 mm ø × 3.6 mm
A13 AC13, DA13, PR48, ZA13, orange tab 280 mAh 7.9 mm ø × 5.4 mm
A675 AC675, DA675, PR44, ZA675, blue tab 600 mAh 11.6 mm ø × 5.4 mm

 
Last updated:  

Overview & Terms
8 March 2012
Single Use
7 January 2016
Rechargeable
1 September 2013
Battery Analyser
21 November 2017
Battery Shopping
12 May 2018

Recommended Batteries
for Particular Uses

16 May 2014

 

Original article by Ian Mander, 22 July 2002

Single Use Test
6 November 2007
Rechargeable Test
8 January 2019
Test Procedure
4 June 2011
Button and Coin Cell Shopping
12 October 2018
More Info & Links
29 February 2012
  LSD Shootout
7 January 2016
When Battery Testing
Goes Bad –
Consumer Magazine

2 October 2017
Battery Holder Shopping
3 December 2017


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