10 References
10-3 Battery life
BU150R
105
10
10-3 Battery life
■
Battery life
Periodic checks of the lead battery used in the battery unit are required due to the battery
limited lifespan. For the battery checking method, refer to "4-1 Checking the battery"
( P.61 ). Battery replacement is recommended before the battery is expired.
Battery life
(The following is expressed based on the battery's trickle life, the service life of a battery
under the condition where low-frequent (once or twice a month) rechargings and
dischargings are performed.)
Battery
type
Expected battery life
(Ambient
temperature 40°C)
Expected battery life
(Ambient temperature
30°C)
Expected battery life
(Ambient
temperature 25°C)
Long-life
battery
1.7 years
3.5 years
5 years
* Basically, the ambient temperature have a high influence on the battery life.
■
The periodic recharges are required even if the battery is stored.
The battery self-discharges even if the UPS is not used (i.e., leaving the battery not
charged), and it deteriorates the battery. In the worst case, the battery may become
unusable.
Example of the storing condition and recharging frequencies
When the battery is stored at the storage temperature of 25°C, the battery self-discharges
(and the battery level lowers) to approximately 80% over half a year, and to approximately
50% over a year.
Higher the storage temperature is, faster the battery will self-discharge.
Storage temperature
Auxiliary charging interval
40°C or less
2 months
30°C or less
4 months
25°C or less
6 months
100
80
60
40
20
0
0
3
6
9
12
15
40°C
30°C
25°C
Storage period (Month)
Recharge line
R
em
ai
ni
ng
ca
pa
ci
ty
(%
)
Summary of Contents for BU150R
Page 22: ...2 Installation and connection 2 1 Installation BU150R 22 Incorrect Positions...
Page 92: ...7 How to use option cards 7 3 SNMP Web card BU150R 92 7 3 SNMP Web card LAN 10 100...
Page 102: ...10 References 10 2 Dimensions BU150R 102 Stand for vertical layput 200 200 70 50 70 50...
Page 103: ...10 References 10 2 Dimensions BU150R 103 10 Rubber feet 23 25 405 50 40 358 40 3...
Page 104: ...10 References 10 2 Dimensions BU150R 104 Using Ear brackets 44 5 22 0 13 5 455 25 465...