IEC 61951 PDF

Second edition. This English-language version is derived from the original bilingual publication by leaving out all French-language pages. This part of IEC specifies marking, designation, dimensions, tests and requirements for portable sealed nickel-cadmium small prismatic, cylindrical and . IEC Standard N° IEC & A 1. Nickel-Metal Hydride: cylindrical and button cells. IEC Standard N° – IEC

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We have no ied or corrections for this standard. An appended letter “W” states that this battery complies with all the requirements of the IEC standard for watch batteries, such as dimensional tolerance, chemical leakage, and test methods.

The time now is The long history of disposable dry cells means that many different manufacturer-specific and national standards were used to designate sizes, long before international standards were reached. The people that use batteries appreciate the standard, but have discovered that different charging methods favor the performance under differing use patterns. With the introduction of low self discharge chemistry, the extended charge may be damaging them. Please first verify your email before subscribing to alerts.

You can compare other batteries using the same criteria and see if you can find a deal on the batteries you want to purchase. A multi-section battery two or more voltages from the same package will have a multi-section designation.

The engineers figure out the best way to get the most capacity into the battery and everyone agrees.


This website is best viewed with browser version of up to Irc Internet Explorer 8 or Firefox 3. I “discover” that everyone is charging differently and the currents during use vary widely.

A 2 indicates the basis of positive electrode phase, and could be C, N, M, V or T for cobalt, nickel, manganese, vanadium and titanium respectively. Terminal styles and variants of the same battery can be designated with the letters X or Y.

BS EN 61951-2:2017

Standardized size codes for round batteries which do not follow the current nomenclature but have been retained for ease of use are given by a one or two digit number following the R.

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Need more than one copy? Once the battery reaches full charge, the voltage will start to come down, even though the charger is still charging it. The following is a partial list of IEC standard recommended diameter and height codes for round cells:.

IEC System of Conformity Assessment Schemes

This standard is not included in any packages. Equivalent to a PP3 or transistor battery. Rechargeable batteries were introduced in the C18 standard 611951and lithium types iwc standardized in The attached image has been modified to make it somewhat easier to understand the IEC standardized endurance test procedure.

Subscription pricing is determined by: Round button batteries also carry two-digit size codes such as R44, see the button battery table for typical dimensions.

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Certain cell designations from earlier revisions of the standard have been retained. The letter system was introduced in the edition of the standard, with letters A through J assigned approximately in order of increasing cell volume, for cells typically manufactured at that time.


I come up with a battery that has higher capacity, but when the RC crowd tests it the performance is not up to what is expected. Pretend I am a battery manufacture.

As the battery charges, the voltage will climb until the battery reaches full charge. Is the “standard charge” a “measurement only” type of thing, or is it a true and tested good way of charging if time is not an issue?

A single zinc-carbon torch cell. Last edited by SweD; at The IEC maintains two committees, TC21 established in for rechargeable batteries, and TC35 established in for primary batteries, to develop standards. Certain sizes, given by one or two digit numbers, represent standard size codes from previous editions of the standard.

A zinc-carbon rectangular battery.

IEC – Standards Australia

Sizes given as 4 or more digits indicate the diameter of the battery and the overall height. Charging a battery in 2 – 3 hours is much easier to attend to than having to attend to a 16 hour charge. Without peak detection, you’re just guessing when the batteries are done. If the document is revised or amended, you will be notified by email.