Power Banks Blog
Tips, guides, and reviews to help you find the right power bank.
Power Bank Flight Rules by Country (2025–2026)
Under 100Wh in carry-on only — that's the global baseline. But China, South Korea, and Australia added new rules in 2025. Here's a country-by-country breakdown.
Power Banks with Built-In Cables: Pros and Cons
Built-in cable power banks mean no loose cables, but the connector can't be replaced and speeds cap at 30W. Here's when they make sense and when they don't.
MagSafe Power Banks: How Wireless Charging Works
MagSafe power banks use magnets to align charging coils for 15W wireless speeds. Learn how MagSafe, Qi, and Qi2 compare, plus real-world capacity and efficiency.
Can a Power Bank Charge a Nintendo Switch or Steam Deck?
Yes — the Switch needs 18W USB-C, the Steam Deck needs 45W PD 3.0. Here's what power bank specs to look for and how many charges to expect.
What Is Pass-Through Charging on a Power Bank?
Pass-through charging lets a power bank charge itself and your devices from one outlet. Here's how it works, the types, and which power banks support it.
How to Charge a Power Bank Properly
Use the right charger, keep charge between 20–80%, and store at 50%. Step-by-step guide to charging a power bank for maximum lifespan and speed.
Power Bank Not Charging? 8 Fixes That Work
Power bank won't charge? Work through these 8 causes — from bad cables to deep discharge — and fix the problem in minutes. Covers both input and output failures.
Solar Power Banks: Do They Actually Work?
Built-in solar panels produce just 0.5–2W — enough to trickle-charge, not fully recharge. See real output numbers, when solar is worth it, and better alternatives.
18W vs 30W vs 65W: Charging Speed Explained
18W fast-charges phones, 30W handles tablets, 65W powers laptops. Learn which wattage you need, how charging protocols work, and what your cable limits.
Charge Phone Overnight with Power Bank: Safe?
Overnight charging with a power bank is safe if you use certified hardware on a hard surface. Learn the real risks, what to avoid, and how to do it right.
Power Bank Wh: Calculate Watt-Hours from mAh
Convert mAh to Wh with one formula: Wh = mAh × 3.7 ÷ 1000. See a full reference table, airline limits, and common calculation mistakes to avoid.
Can a Power Bank Explode? Safety Facts
Power bank explosions are rare (1 in 1M) but real. Learn what causes thermal runaway, the warning signs to watch for, and how to minimize risk.
How Long Do Power Banks Last? Lifespan Guide
Power banks last 300–500 charge cycles (2–4 years). Learn what affects lifespan, how capacity degrades over time, and how to extend battery life.
How Many mAh Do I Need? Size Guide
Find the right power bank size for your needs. See how many mAh you need based on your devices, with real charge counts and a practical size comparison.
PD vs QC: Power Bank Charging Explained
USB PD vs Quick Charge — what's the difference for power banks? Compare speeds, compatibility, and which protocol your devices actually need.
Can a Power Bank Charge a Laptop?
A power bank can charge a laptop — but only with USB-C Power Delivery at 45W+. Learn what specs to look for, which laptops work, and how much charge you'll get.
How Long to Charge a Power Bank?
A 10,000mAh power bank takes 2-6 hours depending on your charger. See charging times for all capacities and learn how to charge yours faster.
What Does mAh Mean? Capacity Explained
mAh (milliampere-hour) measures battery capacity. Learn what mAh means, why you only get 60-70% of rated capacity, and how to choose the right power bank size.
20,000mAh Power Bank: How Many Charges?
A 20000mAh power bank charges most phones 3-4 times. See exact charge counts for iPhone 16, Galaxy S25, and Pixel 9 with the math explained.
Can You Bring a Power Bank on a Plane?
Power banks are allowed on planes in carry-on bags only. Under 100Wh needs no approval. Learn TSA, FAA, and airline rules for flying with your power bank.
Not sure which power bank is right for you?
Answer a few quick questions and get personalized recommendations.
Take the quiz