A great opportunity for those who want non-stop backup for their computer without any interruptions! I was using this UPS modified for my personal computer. I am selling it now because I bought an IPS. It is fully running and in fresh condition.
I used to connect it with an old van battery. I easily got 7 to 8 hours of continuous backup.
Your benefit: You can run it by buying a normal small UPS battery from the market for only 600 BDT (in that case, the backup will be as low as a standard UPS).
If you buy and connect an old van battery like I did, you will get incredible backup. The biggest advantage is that even if the van battery goes bad, you can sell it at almost the same price at a scrap shop. That means you have no loss on the battery!
Condition: 100% running and no internal problems.