OPTI-UPS DS3000I - Manual (Page 21)

Battery Maintenance
DS-I 1-3k UPS User Manual
8. Battery maintenance
1-3KVA UPS only requires minimal maintenance. The batteries used for standard models are
value regulated, sealed lead-acid, maintenance free battery. When it being connected to the
utility power, whether the UPS is turned on or not, the UPS keeps charging the batteries and
also offers the protective function of overcharging and over-discharging.
The UPS should be charged once every 4 to 6 months if it has not been used for a long
time.
In the regions of hot climates, the battery should be charged and discharged every 2
months. The standard charging time should be at least 12 hours.
Under normal conditions, the battery life lasts 3 to 5 years. In case if the battery is found
in bad condition, earlier replacement should be made.
Battery replacement should be performed by qualified personnel.
Replace batteries with the same number and same type of batteries.
Do not replace the battery individually. All the batteries should be replaced at the same
time following the instructions of the battery supplier.