Midland’s ER310 and ER210 are the two classic crank radios in its E+READY line, and the bigger ER310 roughly doubles the rated runtime of the smaller ER210. Midland’s product pages rate the ER310 for up to 45 hours of normal use from a 3,500mAh battery, against up to 25 hours from the ER210’s 2,600mAh pack. Both pick up all 7 NOAA weather channels with alerts, both charge from solar, a hand crank or USB, and both have a Cree LED flashlight with an SOS beacon. On October 17, 2026, Midland’s store listed the ER310 at $89.99 and the ER210 at $64.99. Here’s how they differ and which one fits your kit.
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You can find the Midland ER310 on Amazon and the Midland ER210 at Midland’s store.
ER310 vs ER210 at a glance
Figures below come from the current product pages unless I note otherwise.
| Feature | Midland ER310 | Midland ER210 |
|---|---|---|
| Battery (product page) | 3,500mAh lithium-ion | 2,600mAh lithium-ion |
| Rated runtime | Up to 45 hours normal use | Up to 25 hours normal use |
| Backup power | 6 × AA batteries (not included) | None listed |
| Charging | Solar, hand crank, micro USB | Solar, hand crank, micro USB |
| Bands | AM, FM, NOAA weather (7 channels) | AM, FM, NOAA weather (7 channels) |
| Weather alert | Yes | Yes |
| Flashlight | LED, 1,400 lux, low/high, SOS mode | LED, 130 lumens / 1,400 lux, low/high, SOS beacon |
| Search-and-rescue whistle | Yes | No |
| USB output for phones | Yes (emergency top-up) | Yes (emergency top-up) |
| Dimensions | 8.0 × 3.4 × 2.4 in | 6.5 × 2.8 × 1.9 in |
| Weight (Midland spec sheet) | 1.46 lb | 0.93 lb |
| Midland price (Oct 17, 2026) | $89.99 | $64.99 |
A note on battery numbers: The paperwork don’t all agree. Its older spec sheets list 2,600mAh and 32 hours for the ER310 and 2,000mAh for the ER210, and the ER210 manual specifies a 3.7V, 2,200mAh pack. The current product pages list the larger figures in the table. The company may have upgraded the packs over the years, so check the label on the battery in your radio if the exact number matters.
Runtime and power: the main reason to step up
The ER310’s bigger battery is the headline difference, and it comes with a second advantage: a backup compartment for six AA batteries. If the lithium pack runs flat during a long outage and the sky stays overcast, you can drop in alkalines from the junk drawer and keep listening. The ER210 has no AA option, so its lithium pack, the crank and the sun are all you get.
Here’s a rough way to think about how long each lasts during an outage. These are my estimates from Midland’s rated hours, not Midland figures.
| Use pattern (estimate) | ER310 (45 hr rating) | ER210 (25 hr rating) |
|---|---|---|
| Weather radio on 2 hours a day | About 3 weeks | About 12 days |
| Radio on 6 hours a day | About 7 days | About 4 days |
| Radio on all day (12 hours) | About 3–4 days | About 2 days |
Flashlight use and phone charging will shorten those numbers. Turning the volume up does too.
How solar and crank charging actually work
The maker is upfront about what the small solar panel does. Its FAQ says the panel isn’t meant to charge a dead battery. It’s there to extend the charge of a full one. Its advice is to charge fully by USB, then leave the radio somewhere sunny. Kept in the sun, the company says, the ER310 typically goes 2–3 weeks between USB charges. Out of the sun, you get about a week.
The hand crank is for short bursts. The ER210 manual says the speed and length of cranking determine how much charge you get, and the charge light stays on while you crank. Think of it as a way to get a few more minutes of weather radio or a short phone call, not a way to refill the whole battery.
For a normal top-up, the ER210 manual says a completely flat battery takes about 5.5 hours to recharge over USB. Both radios come with a micro USB cable but no wall adapter. The support FAQ says to use any 5V USB charger.
Weather alerts: identical on both
Both radios receive the 7 NOAA/NWS weather channels, from 162.400 to 162.550MHz. When the alert function is on, the radio sounds a siren when your local station sends a warning.
A few details from the support FAQs are worth knowing before you buy:
- No county filtering: the ER310 FAQ says it can’t be set to specific alert types or counties. It sounds for every alert your local station sends, including the weekly test. The ER210 works the same way.
- Stopping the siren: the ER210 FAQ says you can silence an alert mid-siren by holding the WX button for 2 seconds.
- Pick the right channel: The support pages suggest looking up your county’s NOAA channel and choosing the one that comes in clearest if there’s more than one.
If you want alerts filtered to your own county, that’s a S.A.M.E. feature found on tabletop weather radios like Midland’s WR120, not on these portable crank models.
Flashlight and signaling
The lights are effectively the same: an LED with low and high modes plus a Morse-code SOS flash, rated 1,400 lux on both pages (the ER210 page also quotes 130 lumens). Only the larger model adds an ultrasonic whistle, meant to help rescue dog teams locate someone.
A simple grab-and-go kit around either radio
A radio is one piece of a small communications kit. Here’s what I’d keep in the same pouch:
- A card with your county’s weather frequency written on it, plus the frequencies of two local AM news stations.
- Wired earbuds with a 3.5mm plug for the headphone jack, so you can listen quietly at night.
- A 5V USB wall plug and a spare micro USB cable, since neither box includes an adapter.
- A small power bank for phones, so the radio’s own pack is saved for listening.
- A paper map and a pencil for noting road closures and shelter locations read out on local stations.
Keep the pouch in the same spot every time, near the door or with your other emergency supplies, and check it when the clocks change in spring and fall.
USB output: a lifeline, not a power bank
Both radios have a “USB Out” port. The ER210 manual notes that plugging in a device switches the radio into charge mode and turns the radio off. That small pack is meant to get a phone back on for a call or a text, and the radio holds back enough to keep receiving alerts. For full phone refills, pack a separate power bank. I’ve tested several, including the LOVELEDI 15000mAh portable charger.
Size and portability
The ER210 is the one to grab for a go-bag. At 6.5 × 2.8 × 1.9 inches, it’s noticeably smaller than the ER310’s 8.0 × 3.4 × 2.4 inches, and the spec sheets put it about half a pound lighter (0.93 lb vs 1.46 lb). For a car glovebox, a backpack or a small earthquake kit, that difference adds up.
The ER310 makes more sense as the radio that lives on a shelf at home or in an RV, where the longer runtime and AA backup count for more than the extra size.
The newer ER310PRO
There’s also a third option above both. I compared it with the original in a separate comparison, and tested it hands-on in my hands-on review of the PRO.
Which one should you buy?
| Your situation | Better pick |
|---|---|
| Home emergency kit, long outages (hurricanes, ice storms) | ER310: longer runtime plus AA backup |
| Go-bag, car kit or hiking | ER210: smaller and lighter |
| Tight budget | ER210: $25 less at list price |
Many families end up with both: an ER310 at home and an ER210 in the car. Whichever you choose, charge it fully over USB, set the weather channel for your county, and keep it near a sunny window so the solar panel can keep it topped off.
Matching each radio to the hazard where you live
The right pick depends on what you’re preparing for. Here’s how I’d think about it by region, with typical outage lengths as rough estimates rather than official figures.
| Hazard | Typical situation (estimate) | What matters most | My pick |
|---|---|---|---|
| Gulf or Atlantic hurricane | Days to two weeks without grid power | Runtime, spare power source | The bigger radio, plus spare cells |
| Tornado alley | Short notice, sheltering in a basement or interior room | Alert siren, compact size | Either; keep it by the shelter |
| Western wildfire evacuation | Leaving fast with a go-bag | Low weight, small size | ER210 |
| Earthquake country | Cell towers congested, roads closed | AM news, flashlight | ER210 in each car, the larger one at home |
| Northern ice storm | Cold, short daylight, little sun | Battery capacity over solar | The bigger radio |
Cold also matters. Lithium-ion packs deliver less in freezing temperatures, so in winter keep the radio inside your living space, not in an unheated garage or car. The ER210’s headphone jack is handy at night, too: you can monitor the weather channel in a shared shelter without waking everyone.
Setting up the ER210 out of the box
The ER210 manual walks through a short setup. These are the steps I’d do on day one:
- Charge it: plug the micro USB cable into the port marked “USB In.” The charge light comes on, and a flat pack needs about 5.5 hours.
- Find your weather channel: press BAND until you reach the weather band, pull the telescopic antenna all the way out, and step through channels 1–7 with the TUNE buttons until one is clear.
- Arm the alert: press WX ALERT. A flashing “WX” icon on the screen means alerts are on. When an alert arrives, the siren sounds and the flashlight and screen backlight flash. Pressing any button silences it and switches to your weather channel.
- Open the menu: hold WX ALERT / MENU for 2 seconds. From there you can set a 12- or 24-hour clock, choose the backlight mode (off, always on, or 5 seconds after a button press) and show weather channels as frequencies or channel numbers.
- Turn it off: hold BAND for 2 seconds.
A tip for either radio: the weekly NOAA test alert doubles as a reminder to check the battery level. If you’re putting one away for months, the ER310 FAQ says the radio only powers down completely when the battery is removed. The store lists the BATT26L replacement pack as an accessory for both models, at $14.99.
FAQ
What’s the main difference between the Midland ER310 and ER210?
The ER310 has a bigger battery (rated up to 45 hours vs 25), a 6 × AA backup option and an ultrasonic whistle. The ER210 is smaller, lighter and $25 cheaper at list prices.
Do both radios get NOAA weather alerts?
Yes. Both receive all 7 NOAA weather channels and sound an alert when your local station issues one.
Which is better for a car kit?
The ER210. It’s 6.5 × 2.8 × 1.9 inches and about 0.93 lb per Midland’s spec sheet, so it fits a glovebox or door pocket.
Can I turn off the ER210’s screen light?
Yes. The manual lists three backlight modes in the settings menu: off, always on, or on for 5 seconds after a button press.
Do they come with a wall charger?
No. Both include a micro USB cable. The company says to use a 5V USB adapter.