Toyota Prius c 2014 Owner's Manual page 503

Ignition system
Spark plug
Make
Gap
NOTICE
■
Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.
Electrical system
12-volt battery
Open voltage* at
68°F (20°C):
Fully charged
Half charged
Discharged
Charging rates
DENSO FK16R-A8
0.03 in. (0.8 mm)
12.5 V or over
11.0  12.5 V
Under 11.0 V
(*: Voltage checked 20 minutes after the hybrid
system and all the lights are turned off)
3.5 A or less
(Recharge within 10 hours)
6-1. Specifications
501
6