Electronics
UPS
A UPS is not sold in the unit that matters. The VA number on the box is not watts, the two-year warranty on the carton usually covers the battery for one, and the part that decides how long you own it is the sealed lead-acid pack inside - which nobody advertises.
UPS reviews
How to choose a UPS for your computer in India
Start by translating the only number the aisle puts on the box. VA is not watts. A 600VA UPS delivers 360W, a 1000VA delivers 600W, a 2000VA delivers 1200W - the ratio is roughly 0.6 across every brand here, and it is the single most common reason people are disappointed. Add up what your machine actually draws (a mid-range desktop with a monitor and a router sits around 200-300W; a gaming PC with a discrete GPU can pull 500W or more under load) and buy a unit whose watt figure clears it with room to spare. Buying at the edge of the rating is how you end up with a UPS that beeps and trips the moment a game loads.
The second thing to understand is that you are really buying a battery with a box around it. Almost every consumer UPS in India runs sealed lead-acid cells, and the dominant complaint across every brand and every price is the same: backup that started at thirty or forty minutes collapses to two or five somewhere between month six and month twenty-four. Heat accelerates it, and deep-cycling a small pack accelerates it further - which is why the cheapest, smallest units tend to disappoint fastest. Check the battery warranty separately from the unit warranty; they are frequently not the same length, and the shorter one is the one that matters. After that it is mostly detail that still bites: whether the output is a simulated or true sine wave (most are simulated, which some modern PC power supplies dislike), what shape the output sockets are, and whether the low-battery alarm can be silenced. We weight the honest wattage, the battery’s real service life and whether the brand can be reached over anything printed on the carton.