Varian CP-4900 Micro-GC User manual - page 9
Battery
Pack
Varian, Inc.
User Manual Battery Pack and Charger
Page: 3
In order to take full advantage of the properties of the Ni-MH Battery Pack and to prevent
problems due to improper use, note the following points during use of battery operated
products.
Charging
1. Charge the battery within an ambient temperature range of
0 °C to 40 °C.
2. Ambient temperature during charging affects charging efficiency.
As charging efficiency is best within a temperature range of 10 °C
to 30 °C, place the Battery Pack and charger within this
temperature range.
3. At temperature below 0 °C the gas absorption reaction is not
adequate, causing gas pressure inside the battery to rise, which
can activate the safety vent and lead to leakage of alkaline gas
and deterioration in performance and battery leakage.
4. Parallel charging of batteries should be avoided.
5. Never attempt reverse charging. Charging with polarity
reversed can cause a gas pressure inside the battery to rise,
which can activate the safety vent, lead to alkaline electrolyte
leakage, rapid deterioration in battery performance, battery
swelling, or battery rupture.
6. Overcharging should be avoided. Repeated overcharging can lead
to deterioration in performance. Overcharging means charging a
battery when it is already fully charged.
7. Trickle charging (continuous charging) cannot be used with Ni-MH
batteries. To avoid overcharging, a timer measuring the total
charge time should be used.