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Power Bank & Charger Buying Guide – Best Deals Today

A good power bank or charger is one of the most useful cheap upgrades you can buy. Here's how to read the specs, and the deals we're tracking now.

Updated 20 Oct 2026

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Power Bank & Charger Buying Guide – Best Deals Today: deal list

Power banks: what the numbers mean

  • Capacity: a 10,000 mAh power bank charges most phones about 1.5–2 times; 20,000 mAh about 3–4 times. Real output is lower than the label because of conversion losses.
  • Output (watts): 20 W or more is needed for fast charging modern phones. For laptops you need 45 W–65 W with USB-C PD.
  • Ports: USB-C in and out charges faster and works with more devices. Two outputs are handy for sharing.
  • Flights: power banks up to 20,000 mAh (100 Wh) are allowed in cabin baggage, not in checked bags.

Chargers and cables

  • Match the standard your phone uses: USB PD for iPhones and most Android phones, and brand-specific fast charging (like SuperVOOC or Warp) for some OnePlus, OPPO and realme phones.
  • A charger is only as fast as its cable. Use a cable rated for the wattage (60 W or 100 W for USB-C).
  • Buy from known brands — cheap no-name chargers skip safety protections.

Frequently asked questions

Can a fast charger damage my phone's battery?+

No. Phones control how much power they take, and a good charger only supplies what the phone asks for. Heat is what hurts batteries, so avoid charging under a pillow or in direct sun.

10,000 or 20,000 mAh — which should I buy?+

10,000 mAh is pocketable and enough for a day out. 20,000 mAh is better for travel or charging two devices, but it is noticeably heavier.