Bose SoundLink Flex (2nd Gen)
«Specific Uses For Product: [INF]» — a placeholder token, published on a $120 product page.
- Claimed battery life
- 12 h
- Weight
- 590 g
- Charge time
- —
JBL
4.8 out of 5 from 85,483 ratings — the best-scored product on this whole site, and it came out in 2019.
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Six axes, the same rule for every speaker. This is our judgment, not the manufacturer's.
| Battery life | 6/10 | |
|---|---|---|
| Sound | 8/10 | |
| Potencia | 6/10 | |
| Portability | 6/10 | |
| Durability | 7/10 | |
| Value | 7/10 |
The Flip 5 launched in 2019 and it is still the sixth best-selling portable speaker on Amazon, with 4.8 out of 5 from 85,483 ratings — the highest score of any product on this site and in this whole comparison. Newer, cleverer speakers sit below it in both the ranking and the rating.
Its bullet points are five short phrases totalling about twenty words. No AI sound boost, no ambient lighting, no asterisks. Twelve hours, IPX7, party pairing, done. It is the least oversold listing on this page, and probably not by accident.
Amazon's table, on the other hand, gives it 4.2 audio channels. That would be four speakers and two subwoofers; this is one driver and two passive radiators in a tube. It says the battery takes twelve hours to charge, which is exactly how long it plays — the same error as the JBL Go 4, and the same error as both Sony headphones on the other half of this site. It lists three different driver sizes. It calls the sealed rechargeable pack «1 Lithium Metal batteries required», which would be a battery you cannot recharge.
What you actually get for $89.95 is the best sound-per-dollar in this group, 544 g in a bag, and no strap of any kind. There is also no microphone and no aux input, both of which the cheaper speakers above have.
Anything marked «—» is a figure the manufacturer doesn't publish. We don't fill those in by eye.
| Type | Portatil |
|---|---|
| How it attaches | — |
| Power | 20 W |
|---|---|
| Peak power | — |
| Maximum volume | — |
| Drivers | 1 |
| Passive radiator | Yes |
| Frequency response | — |
| App EQ | Yes |
| Claimed battery life | 12 h |
|---|---|
| Battery life at high volume | — |
| Charge time | — |
| USB-C charging | Yes |
| Charges your phone | No |
| Replaceable battery | No |
| Bluetooth version | — |
|---|---|
| Codecs | — |
| Pairs in stereo with a second unit | Yes |
| Two devices at once | — |
| Aux input | No |
| Microphone for calls | No |
| Water resistance (IP) | IPX7 |
|---|---|
| Floats | — |
| Weight | 544 g |
| Dimensions | 7.1 x 2.7 x 2.9 in |
| Strap or handle | No |
| Warranty | 1 year |
| 4.8 out of 5 from 85,483 ratings | The best-scored product on this entire site, and it launched in 2019. Nothing newer here beats it. |
|---|---|
| «Battery Charge Time: 12 hours» | Exactly as long as it plays for. Twelve hours of charging for twelve hours of music. The JBL Go 4 on this site has the same error with 7 and 7, and so do both Sony headphones on the headphone side. It is systemic, not a typo. |
| «Number of Audio Channels: 4.2» | A 4.2 system is four speakers and two subwoofers. This is one driver and two passive radiators, in a tube you hold in one hand. |
| «Battery Capacity: 3000» | No unit. It is 3,000 mAh. |
| Three driver sizes | «Audio Driver Size: 10 centimeters», «Woofer Diameter: 10 centimeters» and «Speaker Size: 16 centimeters». The last one is the length of the speaker. |
| «Number of Batteries: 1 Lithium Metal batteries required» | Lithium metal cells are not rechargeable. This one is lithium-ion and sealed in. |
| «Input Voltage: 3.6 volts» | That is the cell voltage. It charges over USB-C at 5 V. |
| Five bullet points, twenty words | «Wireless Bluetooth streaming. 12 hours of playtime. IPX7 waterproof. Pair multiple speakers with party boost. Premium JBL sound quality.» That is the entire marketing copy for a $90 speaker — the shortest on this site, and the least misleading because of it. |
A summary of the reviews published on Amazon.com as of 2026-09-09.
4.8 out of 5 from 85,483 ratings, the highest on this site. Six years of buyers repeating the same two things: it sounds bigger than it looks, and it survives. The complaints are the missing aux input, the absence of a speakerphone, and a run of reports about the battery degrading after heavy use — expected on a design this old.
Reviews and prices change. Check before you decide.
See reviews and price on AmazonAdd two or more speakers to the comparison and you'll see their spec tables and charts side by side.
«Specific Uses For Product: [INF]» — a placeholder token, published on a $120 product page.
156,455 ratings — more than every other speaker on this site put together.
One kilo in your backpack, 24 real hours, and a power bank that will refill your phone twice.