Also known as: ER310, Midland ER-310
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The Midland ER310 is the default emergency crank radio — the best-documented, most widely stocked unit in the class, with AM/FM and all 7 NOAA weather channels, tone-alert standby, a replaceable 2600 mAh battery, solar trickle, AA backup, and a 130-lumen flashlight, for around $70.1 It does not decode SAME alerts and it has no shortwave — know both before buying.
Key takeaways The best all-around crank radio, honestly framed. Tone-alert standby, not SAME — a plugged-in $30 SAME desktop radio is still the thing that reliably wakes you for a tornado warning; the ER310’s job is staying informed after the grid goes down. Real numbers: ~1 min crank ≈ ~9 min radio, solar is a maintainer not a charger, crank-to-phone charging is effectively useless.2 ~$70. No shortwave. Listening is license-free — no FCC anything, ever. It’s our best overall pick in best emergency radios.
Overview
Midland’s ER310 earned its default status the boring way: a bigger battery than most rivals (2600 mAh Li-ion, roughly 32 hours of radio, and — rare in this class — replaceable), a 6× AA fallback when every rechargeable option is exhausted, and a retail footprint (Midland direct, Best Buy, REI, Amazon) that means it’s actually in stock when a hurricane is on the map. The 130-lumen Cree flashlight with an SOS beacon is genuinely useful; the ultrasonic dog whistle is marketing. Charging is Micro-USB — not USB-C; the newer ER310PRO sibling moved to USB-C and Bluetooth, but the base ER310 stays in the line.
Alerting: what the ER310 actually does
The ER310’s “Weather Alert” is 1050 Hz tone-alert standby: it sits muted on a NOAA channel and wakes when the National Weather Service sends the attention tone before any watch or warning in the transmitter’s whole footprint — which can mean 2 a.m. wake-ups for a flood warning 80 miles away. It is not SAME: it cannot filter by county or display the event type. For the actually-being-woken job, a plugged-in SAME desktop unit beats every crank radio made; the right household setup is one of those plus a crank radio, not instead of one. The ER310’s auto-scan-to-strongest-channel feature at least makes setup foolproof.
Power & the crank-radio reality check
The Gadgeteer’s hands-on testing put honest numbers on the marketing:2
- Crank: about 1 minute of cranking ≈ 9 minutes of radio at modest volume. Fine for news; miserable as a primary power plan.
- Solar: a maintainer. Midland’s own guidance is that the panel is not intended to charge the battery from a low or discharged state — it keeps a charged radio topped up on a windowsill.
- Phone charging: from the charged 2600 mAh cell, a real partial top-up via USB-A. From crank power, the reviewer could not get two different phones to register charging at all. Ignore every crank-charges-your-phone claim in this category.
The practical drill: keep it charged via Micro-USB, keep six AAs in the kit, and treat crank and solar as the deep-reserve tier they are.
GopherTrunk alternative
An SDR needs a computer and wall power — the ER310’s entire reason to exist is working without either, so free software isn’t a substitute here. Where GopherTrunk and a $30 RTL-SDR do fit emergency preparedness is before and after the blackout: scanning your local public-safety, utility, and NOAA weather frequencies so you know what’s actually happening beyond the forecast loop. Our scanner frequencies guide lists what to monitor in an emergency; the ER310 is the battery-independent fallback that sits beside that setup, not instead of it.
Who it’s for
- Buy the ER310 if you want one dependable crank radio for the kit and would rather pay ~$15 extra for the bigger replaceable battery and AA fallback. View on Amazon →
- Buy the ER210 instead for the glovebox — same platform, smaller and cheaper, no AA backup.
- Buy the Kaito KA500 if you want shortwave in a crank radio, or the Sangean MMR-88 for the best receiver quality in the class. Full rankings: best emergency radios.
Sources
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Midland ER310 product page — Midland USA: bands, tone-alert and Weather Scan features, 2600 mAh replaceable battery, AA backup, solar and crank charging, 130-lumen flashlight. ↩
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Midland ER310 review — The Gadgeteer — measured crank runtime (~1 min crank ≈ 9 min radio), solar-as-maintainer behavior, and the failed crank-to-phone charging test. ↩ ↩2
Frequently asked questions
Does the Midland ER310 have SAME alerting?
No. The ER310 has 1050 Hz tone-alert standby: it wakes for any watch or warning anywhere in the NOAA transmitter’s coverage area, which can span many counties. Only a dedicated SAME desktop radio (Midland’s own WR120, for example) filters alerts to the counties you program.
How long does the Midland ER310 run on a full crank?
A hands-on review measured about one minute of cranking for roughly nine minutes of radio at modest volume. Cranking is a last resort — the 2600 mAh battery, good for around 32 hours of radio, is the real power source.
Can the ER310 charge my phone?
From a charged battery, partially — the USB-A output can give a phone a meaningful top-up. From crank power alone, treat it as no: a reviewer could not get two different phones to register charging from the crank at all.
Does the Midland ER310 receive shortwave?
No — AM, FM, and the 7 NOAA weather channels only. If you want shortwave in a crank radio, the Kaito KA500 is the cheapest current option, and the discontinued Eton FR500 and Grundig FR200 cover it used.
Is the ER310 waterproof?
Midland publishes no IP rating for it. Treat it as rain-tolerant at best, not waterproof — if you need a formal splash rating in this class, the Eton Scorpion II carries IPX4 and the Sangean MMR-88 IPX3.