There is no universal standard for labeling batteries. This is a continuous
source of confusion for consumers looking to replace a battery. Most manufacturers
use their own labeling or designation system, which sometimes is similar
to others, but not necessarily.
The International Electrotechnical Commission (IEC, http://www.iec.ch/) has proposed a standard battery designation system that provides at least some clues as to which batteries it refers to. There are two variants of this standard:
The battery designation has five elements:
1. One digit for number of cells connected in series.
2. One letter to denote the electrochemical system.
3. One letter to denote shape (R=Round, P=Not Round).
4. Two or three digits as a unique physical dimension designation.
5. One or two letters as designation modifiers.
The electrochemical system is identified by the following:
L - 'Alkaline'
S - 'Silver Oxide'
C - 'Lithium/MnO2'
B - 'Lithium/CF'
For example, an 'LR44' cell uses alkaline technology (L), is round (R), and has a unique dimension identifier of 44 (11.6mm diameter, 5.4mm height). Or an 'SR44W', which uses silver oxide technology (S), is also round (R), has the same physical dimensions (44), and a modifier of 'W' to denote the 'high drain' variant, as opposed to the SR44SW which is the 'low drain' variant.
The battery designation is as above, except that the physical dimension designation (element 4) is replaced by:
4a. Two-digit code denoting the maximum diameter.
4b. Two-digit code denoting the maximum height.
For example, a 'CR2032' cell uses Lithium/MnO2 technology (C), is round (R), has a maximum diameter of 20mm (20), and a maximum height of 3.2mm (32).
As indicated, not everyone sticks to these standards. The CR2032 cell is also called a DL2032 (by Duracell, no less). The SR44W has many names, including '357', 'V357', 'D357H', '228', 'J', '280-62', 'SB-B9', 'SR1154' and probably others. Competent battery suppliers (such as Battery Force at http://www.battery-force.co.uk) make finding the right battery a lot easier by maintaining cross-reference databases of all of the various codes a particular battery can have.
|Rectangular||48.5mm||33.5 x 9.2 mm|
|Rectangular||48.5mm||26.5 x 17.5mm|
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