Lexus LS 600h L 2012 Owner's Manual page 555

6-1. Specifications
Ignition system
Spark plug
Make
Gap
NOTICE
Iridium-tipped spark plugs
■
Use only iridium-tipped spark plugs. Do not adjust spark plug gap.
Electrical system
12-volt battery
Open voltage* at
68°F (20°C):
Charging rates
552
DENSO FK20HBR11
0.043 in. (1.1 mm)
12.6  12.8 V Fully charged
12.2  12.4 V Half charged
11.8  12.0 V Discharged
(*: Voltage checked 20 minutes after the hybrid sys-
tem and all the lights are turned off)
5 A max.