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If you want maximum battery life, a charging case that doubles as a power bank, and quad-mic noise reduction for side sleepers who hate recharging, choose VOLT PLUS TECH Pro Earbuds; if you need a lighter, low-latency set built for gaming and quick top-ups, choose VIVIDUS Air 31.
• VOLT PLUS TECH Pro Earbuds — biggest strength: A 2,000 mAh charging case that pushes total playtime to roughly 25 hours and even works as a power bank for your phone. That is the headline spec here.
• VOLT PLUS TECH Pro Earbuds — biggest trade-off: At 4 ounces for the set and a bulkier case, they are the heavier of the two, and the water resistance rating is modest.
• VIVIDUS Air 31 — biggest strength: Genuinely light at 1.8 ounces with a low 40 ms latency, which matters if you game or watch video and want audio to stay in sync.
• VIVIDUS Air 31 — biggest trade-off: Battery life is short — about 4 hours per charge — and the warranty is brief compared to the competition.
• Who each is for: Pick the VOLT PLUS TECH if runtime and call clarity are your priorities; pick the VIVIDUS Air 31 if you want the lighter, snappier set for gaming and short sessions.
The VOLT PLUS TECH Pro Earbuds are built around staying powered. The charging case holds a 2,000 mAh battery — that is the same rough capacity as a small phone power bank — and it feeds the buds for up to 25 hours of total listening, with each earbud streaming beyond 5 hours on its own. A full recharge of the case takes about 2 hours. The LED display on the case shows the power level across seven steps, so you are never guessing how much juice is left.
The audio and calling side is where the spec sheet gets interesting for anyone who takes calls. There are quad microphones — two per earbud — paired with CVC 8.1 noise reduction, which the manufacturer states cuts noise by up to 30 dB. Call audio is tuned at 150 Hz and music at 120 Hz, with 103 dB sensitivity and a 26 mm dynamic driver driving an 8D stereo surround effect. Bluetooth 5.3 handles pairing, and a single touch controls playback, volume, and track skipping. Latency sits at 9 ms, which is low enough that lip-sync drift should not be a problem. The buds use an in-ear, bud-shaped design with three tip sizes in the box, and they are rated IPX4 water resistant — fine for sweat and light rain, though the case itself is not waterproof.
If you are a side sleeper, the in-ear bud shape can be a real consideration: some side sleepers find standard in-ear buds press against the pillow, while others prefer a flatter profile. The VOLT PLUS TECH buds are not the lightest option here, so if you roll onto your side and need something that essentially disappears, that weight is worth thinking about. Where this set wins for side sleepers is nighttime listening endurance — 25 hours means you can fall asleep with music playing and not wake up to a dead battery.
Buy these if you want the longest runtime, the clearest calls, and a case that can top up your phone in a pinch. Skip them if you want the lightest possible bud or you need a high waterproof rating for heavy rain or swimming.
The VIVIDUS Air 31 takes the opposite approach: keep it light, keep it fast. At 1.8 ounces, these are among the lighter true wireless sets you will find, and the compact 3.5 x 2.5 x 1.5 inch case slips easily into a pocket. The 13.4 mm dynamic drivers push a 20 Hz frequency response at 98 dB sensitivity, and impedance is 32 ohm. Bluetooth 5.3 gives the same 33-foot range as the VOLT PLUS TECH, but the latency figure is 40 ms — noticeably higher on paper, yet the manufacturer positions these specifically for gaming and video streaming, where that figure is generally acceptable for casual play.
Battery is the clear compromise. You get up to 4 hours of continuous playback, and a 1.5-hour charge refills them via USB-C. That is a short window — fine for a commute, a workout, or a gaming session, not fine for an overnight or a full workday without a top-up. The LED digital display on the case shows battery status at a glance, which helps you plan around the shorter runtime.
Controls are touch-based for music and calls, with a built-in microphone for hands-free use. Noise handling is passive only — the ergonomic in-ear seal blocks some outside sound, but there is no active noise cancellation here. Waterproof construction and RGB lighting round out the feature set, and the package includes the earbuds, case, and accessories. The warranty is listed at one month, which is short, so factor that into how hard you plan to use them.
Buy these if you want a featherweight set for gaming, short workouts, and video, and you do not mind charging more often. Skip them if you need all-day battery, active noise cancellation, or a long warranty.
Side-by-Side: Which Should You Choose?
• Best for lightweight true wireless earbuds for side sleepers → VIVIDUS Air 31. At 1.8 ounces they are less than half the weight of the VOLT PLUS TECH set.
• Best for call quality → VOLT PLUS TECH Pro Earbuds. Quad mics with CVC 8.1 noise reduction rated up to 30 dB.
• Best for gaming and low-latency feel → VIVIDUS Air 31. The manufacturer tunes these for gaming, though note its 40 ms latency is higher than the 9 ms on the VOLT PLUS TECH.
• Best for hifi stereo clip-on style listening on a budget of charging hassle → VOLT PLUS TECH Pro Earbuds. The 26 mm driver and 8D surround effect give the fuller, more immersive presentation, and the case-as-power-bank design means fewer cables to carry.
• Best for travel convenience → VOLT PLUS TECH Pro Earbuds. The case can recharge your phone, which is a genuinely useful trick on a trip.
• Best for quick top-ups → VIVIDUS Air 31. 1.5-hour charge time versus 2 hours.
• Best for water exposure → VIVIDUS Air 31. It is listed as waterproof, while the VOLT PLUS TECH is water resistant (IPX4) and its case is explicitly not waterproof.
For most people, I would buy the VOLT PLUS TECH Pro Earbuds. The 25-hour runtime, the power-bank case, and the quad-mic noise reduction make it the more versatile set for daily life, travel, and calls. For side sleepers specifically, the endurance matters most — you can drift off with audio playing and not worry about a dead battery by morning. The VIVIDUS Air 31 is the better pick only if you prize the lighter weight and quicker charging above everything else, and you can live with 4 hours per charge and a one-month warranty. In my opinion, the VOLT PLUS TECH is the safer all-round choice.
FAQ
They can work if you like the in-ear bud shape and want long runtime. The main caveat is weight — at 4 ounces for the set, they are heavier than the VIVIDUS Air 31, so some side sleepers may find them more noticeable against a pillow.
About 4 hours of continuous playback per charge, with a 1.5-hour recharge time via USB-C. That is short, so plan to top up during the day if you listen for long stretches.
The VOLT PLUS TECH Pro Earbuds. They combine active and passive noise control with quad microphones and CVC 8.1 reduction. The VIVIDUS Air 31 relies on passive isolation from the in-ear seal only.
The VIVIDUS Air 31 is marketed for gaming, but the VOLT PLUS TECH actually lists lower latency at 9 ms versus 40 ms. If sync matters most, the VOLT PLUS TECH has the edge; if you want the lighter set, the VIVIDUS is the pick.
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