One problem that costs a lot of people money in Pakistan is the flood of fake and refurbished batteries dressed up to look brand new. A weak unit not only fails early, it can also send unstable voltage that damages your UPS or inverter, so the real cost is far higher than the sticker price. Sharing this resources page because it has clear buying guides that help you spot the warning signs before you pay. A few simple habits that helped me: always check the manufacturing date for fresh stock, confirm the warranty card is genuine and properly stamped, and buy from a verified seller rather than an unknown shop with no support. The guides also break down which battery size suits different needs, from a small home UPS to a full solar setup, which makes the choice a lot less confusing for a first time buyer. Posting it here in case it saves someone from the same costly mistakes I made early on. What checks do you personally rely on to make sure a battery is genuine before buying? https://daewoobattery.com/blogs/resources