When the power is out, a dead phone cuts you off from alerts, maps, and family. A power bank is one of the highest-value items in a modern emergency kit — if you pick a capacity that matches how you use it.
What mAh means (in plain terms)
Milliamp-hours (mAh) describe capacity. Higher numbers generally mean more recharges, but real-world results depend on phone size, cable quality, temperature, and conversion losses. Treat package claims as approximate.
Rough planning ranges
- 10,000mAh class: often enough for 1–2 phone charges — good for a daily bag or short outage
- 20,000mAh class: more comfortable for multi-day use or sharing with a second device
- Very high capacity (e.g. 50,000–100,000mAh class): better for longer outages, multiple devices, or households — heavier and slower to recharge
Fast charging (PD)
USB-C Power Delivery (PD) can charge newer phones and some laptops much faster. If you own USB-C devices, a PD-capable bank is worth prioritizing for emergencies when time and daylight matter.
Solar power banks
Solar panels on power banks are useful as a supplement in prolonged outages or camping, not always as the only recharge method. Panel size, sun, and angle limit how fast they top up a large battery. Think of solar as a backup to wall charging.
What to keep in the kit
- One bank charged and stored where you’ll find it
- A short USB-C/Lightning cable that fits your phones
- A habit of recharging the bank after any use or every few months
Browse power banks and portable power options at PrepSmart Supply and match capacity to your household size and typical outage length in your area.