Sangean MMR-88 USB-C

Why this one

The cheapest wind-up radio found with a documented crank figure: the manual gives 5 to 7 minutes of listening per minute of cranking, and this EU revision charges by USB-C. GearJunkie recommends the MMR-88 family.

Specifications and sources

FM and input

87.5 to 108 MHz; speaker; USB-C 5 V, 0.5 A input

Battery energy

Replaceable approved 18350 lithium-ion battery, 3.7 V, 850 mAh; calculated 3.145 Wh

Crank claim

1 minute at 120 turns per minute gives about 5 to 7 minutes on AM at moderate speaker volume; FM result not stated

Full-charge claim

Approximately 10 hours; listening volume and band unspecified

Solar

Approximately 15 hours in direct sun to charge, without a measured irradiance or panel wattage

What independent testers found

Limits and cautions

• Older reviews do not prove the USB-C revision's endurance. The maker gives about 10 hours from a full charge, band and volume unspecified.
• The crank figure is the maker's, measured on AM at moderate volume; it is not an independent FM test.
• Solar is a slow top-up, not a dependable supply or phone charger.
• The replaceable cell is an 18350 lithium-ion type, not an ordinary AA or AAA.