Short answer: the Ultimate Ears Boom 4, if you are buying new. The Xiaomi Mi Portable ranks higher than it (#75 vs #110 of 164 medium speakers, 3.4/5 vs 2.9/5) but is discontinued, so only consider it used; the Ultimate Ears Boom 4 is still sold new at $149.99.
The Xiaomi Mi Portable is the better-sounding, lighter option. Good battery life for a 16W speaker: around 12 hours at moderate volume. At 0.8 lbs (373 g) it weighs much less than the Ultimate Ears Boom 4 at 1.4 lbs (620 g). It keeps a wired aux input, which the Ultimate Ears Boom 4 lacks. The tradeoff: A bit of a sharp treble.
What the Ultimate Ears Boom 4 does well: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. Watch for: Not much improvement over the old ones.
Buy the Ultimate Ears Boom 4 new; the Xiaomi Mi Portable is no longer sold new, so it only makes sense as a used find.
Still deciding? The full Portable Bluetooth rankings cover every ranked option.
Specifications Side By Side
| Xiaomi Mi Portable | Ultimate Ears Boom 4 | |
|---|---|---|
| Price | $55 Discontinued | $149.99 |
| Ranked | #75 of 164 in Medium Size Portable Bluetooth Speakers | #110 of 164 in Medium Size Portable Bluetooth Speakers |
| Battery Life | 13 hours (Manufacturer specified) | 15 hours (Manufacturer specified) |
| Weight | 0.8 lbs (373 g) | 1.4 lbs (620 g) |
| Bluetooth | Yes | Yes |
| Bluetooth Version | 5.0 | 5.1 |
| Dimensions | 8.4” x 2.9” x 2.9” (213 x 74 x 74 mm) | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Frequency Response | 80Hz - 20kHz (Manufacturer specified) | - |
| Amplifier Power | 16W | - |
| Aux Input | Yes (3.5mm) | No |
| Bluetooth Codecs | SBC | SBC |
| Built-in Microphone | Yes | No |
| Power Input | USB-C (5V/1A) | USB-C |
| Stereo | Yes | Yes |
| Omnidirectional | No | No |
| TWS | Yes | Yes |
| Drivers | 2x 57mm full-range drivers + 2x passive radiators | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| IP Rating | IPX7 | IP67 |
| Digital Aux Input | No | No |
| EQ | Yes | Yes (via app) |
| App | No | Yes |
| Power Bank | - | No |
| Maximum SPL | - | 85dBC (Manufacturer specified) |
| Strap | - | Yes (built-in loop) |
Related Speaker Comparisons
How Xiaomi Mi Portable compares with other leading options:
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- Minirig 4 vs Xiaomi Mi Portable
- B&O Beosound A1 2nd gen vs Xiaomi Mi Portable
- JBL Charge 6 vs Xiaomi Mi Portable
- JBL Flip 6 vs Xiaomi Mi Portable
Prices on this page were last checked October 4, 2026 at 9:58 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
Xiaomi Mi Portable: $55 Discontinued Amazon eBay
Pros: Good battery life for a 16W speaker: around 12 hours at moderate volume. USB-C charging, stereo pairing support.
Cons: A bit of a sharp treble. Discontinued.
Full Xiaomi Mi Portable review and specifications →
| Amplifier Power | 16W |
|---|---|
| App | No |
| Aux Input | Yes (3.5mm) |
| Battery Life | 13 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.0 |
| Built-in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 8.4” x 2.9” x 2.9” (213 x 74 x 74 mm) |
| Drivers | 2x 57mm full-range drivers + 2x passive radiators |
| EQ | Yes |
| Frequency Response | 80Hz - 20kHz (Manufacturer specified) |
| IP Rating | IPX7 |
| Omnidirectional | No |
| Power Input | USB-C (5V/1A) |
| Stereo | Yes |
| TWS | Yes |
| Weight | 0.8 lbs (373 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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Ultimate Ears Boom 4: $149.99 Amazon eBay
Older model: the Ultimate Ears Boom 3 (ranked lower, rated 2.9/5).
Pros: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. 15 hour battery. Customizable EQ and speaker-pairing via the UE app.
Cons: Not much improvement over the old ones. Weak bass extension and thuddy bass. Gets distorted above 90%
Full Ultimate Ears Boom 4 review and specifications →
| App | Yes |
|---|---|
| Aux Input | No |
| Battery Life | 15 hours (Manufacturer specified) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC |
| Bluetooth Version | 5.1 |
| Built-in Microphone | No |
| Digital Aux Input | No |
| Dimensions | 7.2” x 2.9” x 2.9” (184 x 73 x 73 mm) |
| Drivers | 2x 1.57” (40mm) active drivers + 2x 1.81” x 2.57” (46.1 x 65.2mm) passive radiators |
| EQ | Yes (via app) |
| IP Rating | IP67 |
| Maximum SPL | 85dBC (Manufacturer specified) |
| Omnidirectional | No |
| Power Bank | No |
| Power Input | USB-C |
| Stereo | Yes |
| Strap | Yes (built-in loop) |
| TWS | Yes |
| Weight | 1.4 lbs (620 g) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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