Few accessories cause more confusion — or more wasted money — than chargers. A phone that used to fill up in an hour now crawls, a new 'fast charger' changes nothing, and the spec sheet reads like alphabet soup. The reality is simpler than it looks. Here is what actually determines charging speed, explained with real products and prices from our accessories shelves.

Watts are volts times amps

Wattage is the whole story of charging speed, and it is just volts multiplied by amps. A basic 5V/2A charger delivers 10W. If your phone can accept 25W but the adapter supplies 10W, you get 10W — the phone cannot pull power the charger does not have. The good news: the reverse is safe. Plugging a 10W-capable phone into a 120W charger does not force 120W into it; the phone draws only what it is designed for. Bigger chargers do not damage small phones.

Why your phone charges slowly

Four usual suspects, in order. First, the adapter: that old 5W brick in the drawer still works, just slowly. Second, the cable: cables carry current, and a worn or unrated cable throttles it — a basic 2A cable (MK 2,500) is fine for 10W charging, but fast charging needs a rated cable like the 65W ultra-fast USB cable at MK 7,000. Third, protocol mismatch, explained below. Fourth, heat and battery age: phones deliberately slow charging when hot, and worn batteries accept power more reluctantly.

PD and QC: the languages chargers speak

Fast charging only happens when phone and charger speak the same protocol. USB Power Delivery (PD) is the standard for iPhones, Samsung Galaxy phones, and most USB-C laptops; Qualcomm Quick Charge (QC) is common on Android. Many modern chargers speak both — the Green Lion dual-port wall charger with PD and QC 3.0 at MK 20,000, for example. Samsung adds a wrinkle: its 25W and 45W 'Super Fast Charging' modes need PD with PPS, which generic chargers often lack. For a Galaxy, the safe picks are the genuine 25W travel adapter at MK 30,000 or the 45W PD adapter at MK 50,000.

What GaN actually changes

GaN stands for gallium nitride, a material that switches power more efficiently than the silicon in older chargers. The practical benefit is not speed but size and heat: GaN chargers deliver laptop-class wattage from a plug half the size and run cooler doing it. The Anker 737 GaNPrime 120W at MK 189,000 is the clearest example on our shelves — three ports (two USB-C, one USB-A) that can charge a laptop and two phones from one compact unit. If you travel or carry one charger for everything, GaN is where the money goes.

Match the charger to your phone

iPhone: any USB-C PD adapter of 20W or more unlocks full speed — the genuine Apple 20W USB-C adapter is MK 40,000. Samsung Galaxy: 25W for most models, 45W for Ultras, both needing PPS as covered above. Xiaomi: the Mi 33W wall charger at MK 28,000 suits its 33W-capable models. On a tighter budget, the Oraimo 18W fast charger at MK 20,000 covers everyday Android charging honestly. And for power cuts, a power bank is not optional in Malawi — the Oraimo ultimate slim power bank at MK 22,500 lives in a bag so load-shedding cannot strand you.

One warning before you buy

Chargers are the single most counterfeited accessory, and fake ones are a genuine fire risk — they skip the safety circuitry you are paying for. Buy from sellers who put a warranty in writing; every accessory we sell carries a 12-month manufacturer warranty. If a deal looks impossibly cheap, our guide on the blog to spotting fake electronics explains the tells. The full genuine range — adapters, cables, car chargers, and power banks — is at /category/accessories.