Nikon SB-27 - Manual (Page 82)

82
Notes on batteries
About NiCd batteries
Please note the following points when using NiCd batteries.
• NiCd batteries feature a faster recycling time and greater
efficiency at low temperatures than alkaline-manganese
batteries.
—Other performance data differs depending on battery conditions, and
whether or not batteries are fresh or fully charged.
• When charging NiCd batteries, be sure to use the battery
charger specified by the battery maker and read the instruction
manual thoroughly.
• Charging should be made in an ambient temperature ranging
from 10°C to 30°C (50°F to 86°F).
• Do not recharge NiCd batteries with the reverse terminals
connected or before the batteries have cooled off.
• Overcharging and excessive use may shorten battery life. Do not
overcharge and be sure to turn the power OFF when not using
your Speedlight.
• If NiCd batteries do not last as long as they should after being
properly charged, they are approaching the end of their life.
Replace them with new ones.
Using the SB-27 in low temperatures
As the temperature drops, battery performance becomes
degraded. When taking photographs in low temperatures, use
fresh batteries, and keep a set of spares in a warm place (e.g. a
coat pocket), or use fully-charged NiCd batteries. The SB-27 will
not fire if weak batteries are used in low temperatures.
—Battery power will recover when the temperature goes back to normal.
Avoid warming or cooling the batteries too quickly as this may cause
battery voltage to become unstable.