What the watt number means
The number on a charger is the most power it can give. Your phone only takes as much as it is built to accept. Put a phone that charges at 18W on a 25W charger and it charges at 18W. A higher-watt charger from a proper brand will not damage a phone that takes less.
Samsung Galaxy phones
Samsung calls its 25W charging Super Fast Charging. It needs a charger that supports USB Power Delivery with PPS (Programmable Power Supply), and the Samsung 25W adapter has both. On a charger without PPS, most Galaxy phones drop to ordinary fast charging. You can see which one you are getting on the lock screen: it says either "Super fast charging" or "Fast charging" when you plug in. If your Galaxy supports 25W, the Samsung 25W adapter is the one to buy.
iPhones
Every iPhone from the iPhone 8 onwards fast-charges over USB-C Power Delivery, and Apple recommends a 20W adapter. A 20W USB-C PD charger takes an iPhone to roughly half charge in about 30 minutes. The Samsung 25W adapter also uses USB Power Delivery, so it fast-charges an iPhone too. Whichever you pick, check that the label says PD.
Other Android brands
Xiaomi, OnePlus, Oppo, Vivo and Realme use their own fast-charging systems. Their phones charge fastest on the charger made by the same brand. A standard USB-C PD charger still works with them, but at a slower speed than the original.
The cable matters too
Fast charging over Power Delivery runs through a USB-C port on the charger, so you need a USB-C cable. For an iPhone 14 or older, that means a USB-C to Lightning cable. For an iPhone 15 or later and most Android phones, it is USB-C to USB-C. An old cable with the large rectangular USB-A end will not fit a USB-C charger.
Quick answer
If you have a Samsung Galaxy that supports 25W, buy the Samsung 25W adapter. If you have an iPhone, either charger fast-charges it, as long as the label says PD. If you have another Android brand, the original charger from that brand is the fastest, and a PD charger is a working backup.
Bring your phone to the shop and we will plug it in and show you the charging speed before you pay.
Where to find Verma Mobiles
Cabin No. 5, first floor, SCO 1030-31, Shivaji Market, Sector 22B, Chandigarh 160022, above National Enterprises. Call or WhatsApp 75809 00010.
20W charger listing: https://h-id.vyaparify.com/verma-mobiles-1/product/chargeraccessory-20w-charger-in-sco-1030-31-first-floor-shivaji-market-fast-charging
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