mAh (milliampere-hour) is the standard unit for measuring battery capacity. It indicates how much electrical charge a battery can store. However, the relationship between labeled capacity and actual usable power is more complex than many sellers realize.
Industry Standard Capacity Options:
The power bank market typically offers these capacity tiers:
- 5000-8000mAh: Ultra-portable, 1-2 smartphone charges, ideal for daily commute and short trips
- 10000-15000mAh: Balanced portability and capacity, 2-3 smartphone charges, most popular segment
- 20000-30000mAh: High capacity for tablets and laptops, suitable for extended travel
- 30000mAh+: Maximum capacity for professional use, multiple device charging, subject to airline restrictions [6][7]
Why 8000mAh Matters for Southeast Asian Sellers:
The 8000mAh capacity sits comfortably within the 5000-19999mAh segment, which commands 56.99% of the global power bank market [1]. This makes it a commercially viable choice for B2B sellers targeting:
- Urban professionals needing reliable daily backup
- Students and young consumers with budget constraints
- Promotional merchandise and corporate gift markets
- Travel retailers focusing on carry-on compliant products
You have 10K mAh in the battery pack and 5K mAh in the phone battery, but the efficiency of charging the phone battery and using the battery pack isn't 100%... 1.4 charges is about right [3].

