Short answer — best picks by use case (available in Australia, 2025):

• Best overall (power + value): ZMI No.20 (25,000 mAh, up to 100 W per port, multi‑port, strong efficiency). Good for phones, tablets and laptops. (TechRadar.com)
• Best for heavy laptop users / highest power: Anker Laptop Power Bank / Anker Prime family (high watt outputs — models in 130–300W class for fast laptop charging and multiple devices). Pick a 65–165W or higher PD model if you need to charge a MacBook Pro or gaming laptop. (Anker.com)
• Best compact / pocketable (everyday carry): 4Smarts compact 10,000 mAh or Baseus/UGREEN small MagSafe‑compatible 10,000 mAh wireless banks — light, airline‑friendly and convenient for iPhones. (TechRadar.com)
• Best budget / value: INIU B6 (10k–20k options) or VRURC 20k — solid efficiency and low price. (TechRadar.com)
• Best high‑capacity / multi‑device: Zendure SuperTank Pro or similar 20k–27k models with multiple high‑watt USB‑C PD ports and OLED/LED status displays. (thetimes.com.au)

Important travel/airline rules (Australia & international): pack power banks in carry‑on only. Most airlines allow power banks up to 100 Wh without approval; 100–160 Wh usually require airline approval; >160 Wh are banned on passenger aircraft. Several carriers have also banned using power banks in flight or charging them from seat USBs — check your carrier before you fly. (ABC.net.au)

Quick buying checklist (how to choose the right model)

• Capacity: 5,000–10,000 mAh for day trips; 20,000–27,000 mAh for multi‑day use or tablets; don’t buy >160 Wh if you fly. (mAh ≠ Wh — convert using Wh = (mAh × voltage)/1000; most phone banks are ~3.6–3.7 V cells.) (TechRadar.com)
• Output power: Choose USB‑C PD and match the wattage to your device (20–30W for phones/tablets, 45–65W for most light laptops, 100W+ for power‑hungry laptops). (TechRadar.com)
• Ports & cables: built‑in cables are handy; multiple USB‑C ports let you charge phone + laptop simultaneously. (Anker.com)
• Safety & certifications: look for reputable brands, RCM/CE/FCC markings, and built‑in protections (temperature, short circuit, overcharge). Avoid very cheap, uncertified units. (Baseus.com.au)
• Weight/size: higher capacity and higher output usually mean bigger/heavier units — balance capacity vs portability. (TechRadar.com)

If you want, I can:

• Suggest the single best model for your exact needs (e.g., travel, laptop model, budget) and link Australian retailers (JB Hi‑Fi, Amazon AU, Kogan, Anker AU) with current prices and stock.
• Check airline rules for a specific carrier and route.

Which would you like — tailored single recommendation (say: travel / phone only / laptop) or current Aussie retailer prices for one of the models above?