Prolink UPS only 4 Months used

Prolink PRO700C 650 KVA UPS. warranty left till march 2015.

(Urgent Money Need)
Specification :
TRUE AVR
Wide Input Voltage
Universal Socket
Fast Charging
Capacity : 650 VA
Input :
Voltage Range - 140 - 300V ± 5%
Frequency - 50Hz/60Hz (Auto-sensing)
Phase - Single + GND
Output :
Voltage Range - 230VAC ±10%
Battery Mode - 230VAC ± 10%
Frequency - 50Hz ± 1% (Battery Mode)
Waveform - Simulated Sine Wave (Battery Mode)
and Sine Wave (AC Mode)
Transfer Time - 2 - 8ms typical
Surge : Yes
Protecting / Monitoring :
Short Circuit Protection - Yes (Line Mode and Battery Mode)
Alarm - Audible & Visual
Overload Protection - Line Mode = 110% ±10% Change to fault mode after 5mins and 120% ±20% Change to fault mode after immediately | Battery Mode = 110% ±10% Shutdown after 5secs and 120% ±20% Shutdown immediately
Intelligent Battery - Prevent overcharging of battery
Management - Protect battery and prolong battery life
Battery :
Type - 12V/8.2AH - 1pc
Backup Time - 8 - 20 minutes depending on load
Recharge Time - 90% capacity after 4 - 6 hours