No servicing has been done on the motherboard/circuit. We have a collection of all types of online and offline 650VA, 1200VA, 2KV, 3KV UPS. *** 1200 VA without battery is 1300 Taka. 1200 VA supports 2 batteries of 12 Volts, meaning 24 Volts, and you can charge them. You will get 750 Watt+ output from the 1200 VA. *** If someone uses a large auto-rickshaw battery, you will get about 3-5 hours of backup. *** If someone buys 4 or more for business, I will give a discount. Reason for sale - We buy and sell IT project equipment that has been used sparingly from various offices in lots.