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LITHIUM BATTERY CALCULATIONS
How to Calculate Watt Hours
Packing Instructions: 965, 966, 967
To conform to Section II requirements: ? ? MAX Lithium per cell 20Wh MAX Lithium per battery 100Wh

How to Calculate Lithium Content
Packing Instructions: 968, 969, 970
If do not have enough information to determine the lithium content of a battery, the following formulas will assist you: To conform to Section II requirements: ? ? Max 1g per cell 2g max per battery

Batteries and cells above these limits must conform to Section I requirements, ship as class 9.

The calculation used to determine watt hours is:

Volts x ampere hour (Ah) = watt hours
Example, if the battery you wish to ship is rated at 11.1 volts and 4,400 mAh per cell: ? 4,400 mAh is 4,400 milli-ampere hours. Since most batteries have a low ampere hour ratings, they are rated in milliamperes per hour (mAh), one thousandth of an ampere hour (Ah). ? Since a milliampere hour is one thousandth of an ampere hour, divide 4,400 mAh by 1000 to get ampere hours (Ah). 4,400 mAh ÷ 1000 = 4.4 Ampere hours To determine the watt hours in this battery, multiply 11.1 volts by 4.4 ampere hours: 11.1 V x 4.4 Ah = 48.8 Wh

Batteries and cells above these limits must conform to Section I requirements, ship as class 9.

The calculation used to determine lithium content is:

Ah per cell x 0.3 gm x number of cells
? Many batteries are not rated in Ampere hours (Ah), they are rated in milliamperes hours (mAh). Milliampere hours are one thousandth of an ampere hour. To determine the Ah, divide the mAh by 1,000. ? It requires about 0.3 grams of lithium metal to produce 1 Ampere hour of power. Example, if the battery you wish to ship is rated at 2,500 mAh per cell and contains 6 cells: ? Divide 2,500 mAh by 1,000 to get the rating in Ampere hours: 2,500 mAh ÷ 1,000 = 2.5 Ah ? Multiply the Ah by 0.3 gm to determine the amount of Lithium in each cell: 2.5 x 0.3 gm = 0.75 grams of lithium in each cell ? Multiply the amount of lithium in each cell by the number of cells in each battery: 0.75 grams/cell x 6 = 4.5 grams of lithium in the battery

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