Midland ER310PRO review: a weather radio that can finally keep a modern phone charged in an outage

This is a research-based review, based on manufacturer specs and published data. We do not test products. Specs and FAQ answers come from Midland's ER310PRO product page, checked November 1, 2026, and from the National Weather Service's NOAA Weather Radio pages.

Older crank radios share a problem that Midland admits in its own FAQs: they were designed when phone batteries were small, and they will not reliably charge a current smartphone. That matters in an outage, when the phone is the household's flashlight, news feed and emergency line. The ER310PRO is Midland's answer: a 10,000 mAh battery and a FAQ that says a full charge powers most smartphones two to three times.

The rest is the familiar Midland recipe. NOAA Weather Radio alerts straight from the National Weather Service, AM and FM, a Cree flashlight with an SOS strobe, solar and a hand crank. USB-C replaces micro-USB, and Bluetooth streaming turns it into a speaker.

Who should buy it

• Households that want one grab-and-go device for alerts and phone power instead of a radio plus a separate power bank.
• People in hurricane and wildfire shutoff regions who expect several days without grid power.
• Anyone who has standardized on USB-C cables for outage gear.
• Families with a power station who want a radio they can refill fast from its USB-C port.

Who should skip it

• Anyone who wants an AA fallback. Midland lists USB-C, solar and hand crank only. The Midland ER310 takes 6 AA cells.
• Buyers who want county-specific alerts. Midland does not describe SAME coding, so expect alerts for the whole broadcast area.
• Shortwave listeners. The Kaito KA600 adds shortwave and longwave bands.
• People who need fast laptop charging. The phone port is a 5 V, 2.1 A USB-A output.

Strengths

• Real phone backup. Midland's FAQ says a full radio charge can power most smartphones 2 to 3 times through the USB-A port.
• Long radio runtime. 200+ hours of battery life during radio use, per Midland. Even at several hours a day, that is weeks of listening.
• USB-C charging. Midland lists 6 to 8 hours for a full charge from a wall adapter or computer, and the included cable supports bidirectional power delivery.
• NOAA alerts. Weather alerts direct from the National Weather Service.
• Useful extras. A Cree LED flashlight with SOS strobe, a clock and temperature display, and an ultrasonic dog whistle Midland describes for canine search and rescue teams.

Drawbacks

• No disposable battery backup. Once the internal battery is spent, you are back to sun and crank.
• Solar maintains, it does not revive. Midland's FAQ says the panel is not intended to charge the battery from a low or discharged state.
• Slow full recharge. 6 to 8 hours over USB-C, per Midland. Plan refills from a power station or car while you have the chance.
• Phone charging uses the radio's reserve. Every phone charge comes out of the battery that runs the alerts. Ration it.
• No water-resistance rating is listed on the product page.

How it compares

The ER310PRO against the radios most people weigh it against. Figures are from each manufacturer's page, checked November 1, 2026.

Using it in a long outage

Before the storm

1. 01Charge it fully over USB-C. Midland lists 6 to 8 hours, so start the day before a forecast storm.
2. 02Look up your NOAA Weather Radio channel on the National Weather Service station listings and set the radio to it.
3. 03Pack a USB-C cable and a USB-A to Lightning or USB-C cable for each phone in the house.
4. 04Set it in a sunny window. Midland says a fully charged radio kept in the sun typically goes 2 to 3 weeks between charges.

A budget for the battery

Treat the 10,000 mAh battery as two accounts. The radio needs only a little of it: Midland rates more than 200 hours of radio use on a full charge. Phones need a lot: Midland says a full charge covers most smartphones 2 to 3 times. A reasonable rule is to give phones no more than half the battery, and top them up early rather than letting them run flat. That keeps alerts on for the rest of the outage.

NOAA Weather Radio All Hazards is a network of more than 1,000 transmitters that broadcasts official National Weather Service warnings, watches and forecasts 24 hours a day, according to the NWS. It also carries non-weather emergency messages through the Emergency Alert System. That is the reason to keep the radio on standby with alerts set, rather than switching it on only when you remember.

When the sun is weak

In a winter outage or a run of cloudy days, the panel will not keep up with phone charging. Refill the radio from a power station such as the EcoFlow RIVER 3 Plus, or from a car's USB port while the car runs outdoors for another reason. Never run a car or generator in a garage to charge devices. Ready.gov advises planning batteries and other power sources, such as a power bank, before an outage.