Short answer: if you are choosing between the JBL Charge 3 and Charge 4 today, the Charge 4 is usually the better legacy buy because it has USB-C charging, higher rated output and JBL Connect+. The Charge 3 still has one useful advantage: a built-in speakerphone. But in 2026, neither model makes much sense at a high price because the current JBL Charge 6 is substantially more modern.
The key is price. Both the Charge 3 and Charge 4 are old enough that battery condition matters as much as the original specification, so a cheap, healthy used unit can be a good buy while an expensive “new old stock” unit usually is not.
JBL Charge 3 vs Charge 4: the important differences
| Feature | JBL Charge 3 | JBL Charge 4 |
|---|---|---|
| Rated output | 2 × 10W | 30W |
| Bluetooth | 4.1 | 4.2 |
| Battery | 6000mAh | 7500mAh |
| Claimed playtime | Up to 20 hours | Up to 20 hours |
| Charging time | About 4.5 hours | About 4 hours |
| Charging port | Micro-USB | USB-C |
| Water resistance | IPX7 | IPX7 |
| 3.5mm AUX input | Yes | Yes |
| Powerbank function | Yes | Yes |
| Speakerphone | Yes | No |
| Multi-speaker system | JBL Connect / later Connect+ support | JBL Connect+ |
JBL’s own documentation lists the Charge 3 with a 6000mAh battery, Bluetooth 4.1, IPX7 waterproofing, a speakerphone and up to 20 hours of playback. The Charge 4 moves to a 7500mAh battery, Bluetooth 4.2, USB-C charging and 30W rated output while keeping the same claimed 20-hour playback figure. You can check the original specifications on JBL’s Charge 3 and Charge 4 product pages.
Which sounds better?
The Charge 4 is the more powerful design on paper, but this is not a simple “30W beats 20W” contest. The Charge 3 uses two active drivers, while the Charge 4 uses a single larger active driver with passive radiators. Their tuning and driver layout differ, so output wattage alone does not tell you which sound signature you will prefer.
For most buyers, the practical advantage of the Charge 4 is that it can play with more headroom and is the newer design. The Charge 3 can still sound very good for casual listening, especially if you find one in excellent condition at a much lower price.
Battery life: condition matters more than the old spec sheet
Both speakers were advertised for up to 20 hours of playback, but those numbers describe the batteries when new. The Charge 3 dates from the mid-2010s and the Charge 4 from the late 2010s, so many used examples now have years of charge cycles behind them.
If you are buying second-hand, ask how long the speaker actually runs at moderate volume. A worn battery can turn an otherwise good bargain into a poor one, and battery health is more important than comparing the original 6000mAh and 7500mAh capacities.
Charge 4 has the more convenient charging setup
This is one of the clearest everyday differences. The Charge 3 charges over Micro-USB, while the Charge 4 uses USB-C. The Charge 4 also has a slightly shorter quoted charge time.
Neither charging system is cutting-edge by 2026 standards, but USB-C makes the Charge 4 much easier to live with if the rest of your devices already use USB-C cables.
The Charge 3 still has one feature the Charge 4 dropped
The Charge 3 includes a noise- and echo-cancelling speakerphone, so you can use the speaker for calls. JBL removed that feature from the Charge 4.
If speakerphone use genuinely matters to you, that can be a reason to choose the older model. For everyone else, the Charge 4’s newer charging connection is likely to matter more often.
Waterproofing and portability
Both are rated IPX7, which means they were designed to survive temporary immersion in water under the conditions defined by the rating. It does not mean an old used speaker is guaranteed to remain perfectly sealed after years of wear, drops or previous repairs.
The Charge 3 is a little lighter, while the Charge 4 is slightly larger and heavier. Neither difference is dramatic; both remain portable rather than pocket-sized.
What about JBL Connect and Connect+?
The Charge 4 uses JBL Connect+, while early Charge 3 units shipped with JBL Connect. Some Charge 3 units received Connect+ support through firmware, but compatibility depends on the unit and firmware history. If linking multiple older JBL speakers is important, check the exact speaker and app before buying rather than assuming every Charge 3 will behave the same way.
Should you buy either one in 2026?
Buy the Charge 3 if it is very cheap, the battery still holds a good charge, and you specifically value the speakerphone or do not care about Micro-USB.
Buy the Charge 4 if you want the stronger all-round legacy option. USB-C, higher rated output and Connect+ make it the easier recommendation between these two.
Skip both if the asking price gets anywhere near a current JBL model. The modern Charge 6 has Bluetooth 5.4, IP68 water and dust resistance, Auracast, a built-in powerbank, a 45W total rated speaker system and up to 28 hours of advertised playback with Playtime Boost. It also charges in about three hours.
Charge 3 vs Charge 4 verdict
Between the two old models, the JBL Charge 4 is the better choice for most people. It is easier to charge, has the more modern multi-speaker system and offers more rated output.
The Charge 3 only becomes the better buy when it is considerably cheaper, in better battery condition, or when you specifically want its speakerphone. In 2026, though, the smartest comparison is not simply Charge 3 versus Charge 4; it is whether either used speaker is cheap enough to justify choosing it over a much newer model.
