Long Term Testing Results for Popular Power Banks
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- 来源：OrientDeck
So you’ve got yourself a shiny new power bank—or maybe you’re thinking about buying one. But here’s the real question: will it still work great after six months? A year? We put five of the most popular portable chargers through rigorous long-term testing to find out which ones truly stand the test of time.
Over 12 months, we charged each power bank daily, recorded capacity retention, cycle life, temperature changes, and build durability. Our goal? To separate marketing hype from real-world reliability.
The Contenders
- Anker PowerCore 10000mAh
- RavPower PD Pioneer 20000mAh
- Xiaomi Mi Power Bank 3 Pro 20000mAh
- RAVPower Portable Charger 16000mAh (Solar)
- Zendure SuperTank Pro 27000mAh
Capacity Retention After 1 Year
Battery degradation is inevitable—but how fast does it happen? We measured remaining capacity after 300 charge cycles (roughly one cycle per day).
| Model | Initial Capacity (mAh) | After 1 Year (mAh) | Retention Rate | Efficiency Score* |
|---|---|---|---|---|
| Anker PowerCore 10K | 10,000 | 9,450 | 94.5% | 9.2/10 |
| RavPower PD 20K | 20,000 | 18,200 | 91.0% | 8.7/10 |
| Xiaomi Mi 3 Pro | 20,000 | 17,600 | 88.0% | 8.3/10 |
| RAVPower Solar 16K | 16,000 | 13,800 | 86.3% | 7.1/10 |
| Zendure SuperTank Pro | 27,000 | 23,500 | 87.0% | 8.5/10 |
*Efficiency Score includes heat output, charging speed consistency, and port durability.
What the Data Tells Us
Anker came out on top—not just for capacity retention, but for consistent performance and minimal heat buildup. Their IQ charging tech adapts to your device, reducing stress on the battery over time.
Xiaomi held up well, though we noticed slower recharging speeds after month 9. The solar-powered RAVPower model showed weakest longevity—likely due to lower-grade lithium cells and exposure sensitivity.
Durability & Real-World Use
We dropped each unit from waist height 50 times (don’t try this at home). Only Zendure and Anker survived without casing cracks or port damage. The Xiaomi unit developed a loose USB-C port by month 10.
Temperature tests revealed that Zendure ran hottest (+38°C under full load), while Anker stayed cool at +29°C—important for battery lifespan.
The Verdict
If you want a power bank that lasts, go with Anker PowerCore 10000mAh. It’s not the biggest, but it’s the most reliable over time. For heavy users, Zendure SuperTank Pro offers massive capacity and solid build, though it degrades slightly faster.
Avoid cheap knockoffs and solar models unless you’re off-grid. They may save money upfront, but they won’t last.
Bottom line: Long-term value beats short-term specs. Charge smart, charge safe.