5.1.2 Starting mode. 5.1.2.1 Starting disturbances. Fully charged military vehicle batteries shall be used, which are batteries that draw less than 5A from a 28 VDC charging source measured with an electrolyte temperature between 27°C and 38°C. This characteristic applies to starting the second engine of a multi-engine vehicle, or the slave starting of another vehicle. 5.1.2.2 Initial engagement surges. During this disturbance, the voltage shall not fall below 6 VDC and the duration shall not exceed 1 second. 5.1.2.3 Cranking level. The steady voltage during cranking shall not fall below 16 VDC (no more than three cranking attempts of 30 seconds each with 2 minute cranking level pauses between attempts). 5.1.3 Normal operating mode. The vehicle system operates with the generator and batteries. 5.1.3.1 Steady-state voltage. The circuit steady-state voltage shall be between 25 VDC and 30 VDC. 5.1.3.2 Ripple. The upper and lower peaks of ripple voltage shall each be less than 2V from the steady state limits. The frequency components of the ripple shall be within the range 50 Hertz (Hz) to 200 kilohertz (kHz).