Under Section IB, what are the cell and battery watt-hour limits?

Under Section IB, what are the cell and battery watt-hour limits?

• A. Cells <= 50Wh; Batteries <=200Wh
• B. Cells <= 20Wh; Batteries <=100Wh
• C. Cells <= 100Wh; Batteries <=200Wh
• D. Cells <= 5Wh; Batteries <=50Wh

Answer: (B)

Section IB uses energy limits to keep lithium batteries safe to transport by restricting how much energy a single cell or a single battery can store. The allowed limits are that a standalone cell can store up to 20 watt-hours and a complete battery can store up to 100 watt-hours. The watt-hour rating (Wh) is found by multiplying the cell’s nominal voltage by its capacity in amp-hours (Wh = V × Ah). For example, a common lithium-ion cell at about 3.7 volts and around 5 Ah stores roughly 18–19 Wh, which fits under the cell limit. A battery pack total of about 100 Wh or less stays under the battery limit. If either the cell or the battery exceeds these amounts, stricter sections with additional packaging and handling requirements apply.

Section IB uses energy limits to keep lithium batteries safe to transport by restricting how much energy a single cell or a single battery can store. The allowed limits are that a standalone cell can store up to 20 watt-hours and a complete battery can store up to 100 watt-hours. The watt-hour rating (Wh) is found by multiplying the cell’s nominal voltage by its capacity in amp-hours (Wh = V × Ah). For example, a common lithium-ion cell at about 3.7 volts and around 5 Ah stores roughly 18–19 Wh, which fits under the cell limit. A battery pack total of about 100 Wh or less stays under the battery limit. If either the cell or the battery exceeds these amounts, stricter sections with additional packaging and handling requirements apply.