Sealed lead-acid, non-spillable or gel type batteries under 12 volts or 100 Wh

The battery must not have a voltage greater than 12 volts and a Watt-hour rating of not greater than 100 Wh. Equipment must either be protected from inadvertent activation, or the battery disconnected and exposed terminals insulated. Spare batteries must be protected from short circuit by the effective insulation of exposed terminals. No more than two individually protected batteries per person. Passengers should check with their airline for operator variations.