Do you mean a portable charger (power bank) for Android phones? Below is a quick buying guide plus specific recommendations available in Australia (Sept 28, 2025).

What to look for

• Capacity (mAh): 5,000–10,000 mAh for one full phone charge (compact); 20,000–30,000 mAh for 2–3 charges or for tablets/laptops. Convert mAh to Wh if you travel by air (airline limits apply).
• Output and protocols: Look for USB‑C Power Delivery (PD) and PPS for modern Android phones (fast charging). 20–45W is plenty for phones; 65W+ if you want to charge laptops.
• Ports: USB‑C in/out (allows charging the bank and your phone with one cable) and at least one additional port if you charge two devices.
• Size/weight: Higher capacity = heavier. Choose based on how you carry it.
• Safety & certifications: Over‑current/over‑temp protection and reputable certifications (UN, CE, etc.). Also check airline rules for carrying power banks.
• Extra features: Built‑in cable, digital battery meter, wireless charging (useful for some phones), passthrough charging (charge bank while it charges devices) — only if you need them.

Top picks available in Australia (current, local sources)

• Best overall (high capacity / high output): ZMI No.20 — 25,000 mAh with up to 100W output (great for phones, tablets and many laptops). Good balance of capacity and fast charging. (TechRadar.com)
• Best compact / powerful: Anker Prime 12,000 mAh (up to ~130W in newer Prime series) — compact, two USB‑C ports and a digital display (good if you want power without bulk). Check Anker AU listings for exact models. (Anker.com)
• Best budget (everyday carry): INIU B6 — ~10,000 mAh with 20W PD (lightweight and affordable). TechRadar and local reviews list it as a solid budget option. (TechRadar.com)
• Best magnetic / wireless (for Android phones that support wireless Qi): Belkin BoostCharge Magnetic wireless power banks (5K/8K/10K) and other BoostCharge PD power banks — good if you want MagSafe‑style magnetic attach or Qi2 wireless. Belkin sells multiple PD and hybrid models in Australia. (Belkin.com)

Quick buying tips for Australians

• If you fly, check airline battery/Wh limits and pack power banks in carry‑on. Tech sites note some airlines and regions have specific rules; check your carrier before travel. (TechRadar.com)
• Match the PD wattage to your device: most Android phones won’t need more than 45W to reach full fast‑charge speeds; higher wattage helps with laptops. (TechRadar.com)
• Buy from authorised local retailers (Anker AU, Belkin AU, major retailers) to ensure warranty and correct regional plugs/certification. (Belkin.com)

If you want, I can:

• Suggest 2–3 specific models priced in Australia right now (I’ll check local stores), or
• Recommend the best single pick for your exact phone model and how you use it (daily carry vs. travel).