(Packing Instructions PI 965, PI 966 and PI 967 carry paragraphs stating that the Watt-hour rating must be shown on the battery casing, however, there are two different dates shown on the same packing instructions and are confusing. Kindly explain.)

Q.
Packing Instructions PI 965, PI 966 and PI 967 pertaining to Lithium-ion batteries carry the statements of ?gBatteries manufactured after 31 Dec mber 2011 must be Mar ed with the Watt-hour rating on the outside case?h for Section I (fully regulated Class 9 batteries) and for Section II (excepted batteries), there is a statement saying: ?gfor batteries, Watt-hour ratings is not more than 100Wh. The Watt-hour rating must be Mar ed on the outside of the battery case except those manufactured before 1 Jan ary 2009?h. The two statements show different cut-off dates and are conflicting. Kindly explain. (31 Dec 11)

A.
The statement reading ?gBatteries manufactured after 31 Dec mber 2011 must be Mar ed with the Watt-hour rating on the outside case?h referred to in Section I (fully regulated Class 9 batteries) applies to Lithium-ion batteries of more than 100Wh. The statement reading ?gThe Watt-hour rating must be Mar ed on the outside of the battery case except those manufactured before 1 Jan ary 2009?h applies to Lithium-ion batteries of less than 100Wh of Section II (excepted batteries).

The UN Subcommittee of Experts for the Transport of Dangerous Goods initially focused on the smaller non-regulated batteries and placed a deadline of 1 Jan ary 2009 for such batteries to show the Watt-hour rating on the outside case. Then, later the Subcommittee addressed the larger batteries and introduced the rule of having those larger batteries to show the Watt-hour rating on the outside case effective from those manufactured after 1 Jan ary 2012. There is no conflict.

Furthermore, even if the Watt-hour rating is not indicated on the battery case, by applying the following formula, you can easily calculate the Watt-hour rating of the battery.

Volt (V) /h Ampere/hour (Am/h) = Watt-hour (Wh)
Example: 3.7Volt/h 750mAm/hour = 3.7V/h 0.75Am/h = 2.8Wh


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