Omron BN100T, Instruction Manual, Page: 106 / 110

10 References
10-3 Battery life
BN50T/BN75T/BN100T/BN150T/BN220T/BN300T
10-4
10-3 Battery life

Battery has a limited life span.
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".
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) re-
chargings 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) UPS Series
Long-life
battery 2 years 4 years 5 years BN-T
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 un-
usable.
• Example of the storing condition and recharging frequencies
Recharge line
Storage period (Month)
R
em
ai
ni
ng
cap
acit
y
(%)
<Description>
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