Toyota 2013 Prius Owner's Manual page 640

6-1. Specifications
Electrical system
12-volt battery
*
1
Open voltage
68 °F (20 °C):
Charging rates
*
1
: Voltage is checked 30 seconds after the hybrid system and all lights are
turned off.
Transmission
*
2
Fluid capacity
Fluid type
*
2
: The fluid capacity is the quantity of reference.
If replacement is necessary, contact your Toyota dealer.
NOTICE
Transmission fluid type
■
Using transmission fluid other than "Toyota Genuine ATF WS" may cause
deterioration in shift quality, locking up of your transmission accompanied by
vibration, and ultimately damage the transmission of your vehicle.
618
PRIUS PHV_OM_OM47787U_(U)
Fully charged
Half charged
at
Discharged
12.5 V or over
11.0 ⎯ 12.5 V
Under 11.0 V
5 A max.
3.6 qt. (3.4 L, 3.0 Imp.qt.)
Toyota Genuine ATF WS