Understanding Power Delivery (PD) & Real Capacity
Power banks lose 20–30% of their energy to heat conversion. A 10,000mAh power bank delivers roughly 6,800mAh of actual usable charge.
Power Bank Wattage & Capacity Guide
| Target Devices | Recommended Capacity | Min Wattage Output | Recharge Time of Power Bank | Price (INR) |
|---|---|---|---|---|
| Phone & Earbuds Only | 10,000 mAh | 20W – 22.5W | 3.5 Hours | ₹1,100 – ₹1,600 |
| 2 Phones + All-Day Travel | 20,000 mAh | 22.5W – 33W | 5 – 6 Hours | ₹1,800 – ₹2,500 |
| MacBook Air & Thin Laptops | 20,000 mAh | 65W PD 3.0 | 2 Hours (with 65W wall plug) | ₹3,600 – ₹4,800 |
| Pro Laptops / Steam Deck | 25,000 – 27,650 mAh | 100W – 140W PD 3.1 | 2 Hours | ₹6,000 – ₹9,500 |
Key Decision Takeaways:
- DGCA Airline Flight Rules (Crucial): Indian and international airlines permit power banks up to 100Wh (27,000mAh) in cabin carry-on luggage. Power banks are strictly banned in check-in baggage.
- Pass-Through Charging: Allows you to charge the power bank and connected devices simultaneously from a single wall socket in hotels.
- BIS Certification: Never buy unbranded power banks from street vendors or train stations; cheap lithium polymer cells lack thermal runaway cutoffs.
Rupee Cost Breakdown:
- Everyday Phone Power Bank: ₹1,399 (Mi / Realme 10000mAh).
- 65W Laptop Power Bank: ₹3,999 (Ambrane / Cuktech / Baseus).
- High-Wattage 100W Cable: ₹499 (Ensure cable is rated for 5A / 100W E-marker).
What to Check Before Buying:
- Verify that the Type-C port supports both Input and Output.
- Check if low-current charging mode exists for safely powering fitness bands and smartwatches.
