Smart glasses run out of power in hours, not days. The HD5 Ultra carries a 300mAh battery in the frame plus a 2000mAh charging case, good for about 11 hours of music, with a full recharge in 40 minutes. Check the frame battery, the case capacity and the audio setup separately.
Why battery life is the first complaint
A slim frame cannot hold a big battery. Everyday spectacles weigh between 35 and 50 grams, and any added bulk presses on the nose bridge and behind the ears. Powering a camera, a wireless chip and a microphone array all day inside that frame is beyond what the current models can do.
White-label frames shown at IFA 2025 ran their cells down in just a few hours of multimedia use, according to BGR's José Adorno. Snap's 2026 Specs manage about four hours on a full charge. Simpler audio designs last longer: Meta's Ray-Ban Meta Audio runs for up to 12 hours on assistant tasks.
Amazon reviews of the Razer Anzu tell the same story. One critical review reports about six hours of use, a useful low-battery audio alert — and a charging setup that needs a cable on each arm, with a magnetic connection that drops the charge if it gets nudged. The same review notes the volume works in a quiet room but cannot be made out over ambient noise, and the glasses offer no volume control on the device at all.
The trap for importers: spec sheets quote music playback time — nine hours, ten hours — because audio sips power. Video recording is a different load: sensor, encoder and Wi-Fi run at once, and the slim frame cannot shed the heat. Read the sheet the way a buyer will use the glasses, and ask for the recording minutes, not just the music hours. The same trap applies to smartwatches — see our battery guide.
Three models, side by side
| Model | Frame battery | Charging case | Music | Video recording | Full charge | Weight |
|---|---|---|---|---|---|---|
| HD5 Ultra | 300mAh | 2000mAh | About 11 hours | 120 min audio; max clip 12 min | 40 min via case | 35g |
| X01 | 220mAh | 3600mAh (~15 full charges) | 6–7 hours | 50 min; max clip 12 min | 1.0 hour | — |
| CY08 | 290mAh | None stated | About 9 hours at 80% volume | Not stated | 2 hours or less | — |
Two things to read off this table. First, the case is the battery: the X01's 3600mAh case holds about 15 full charges for its 220mAh frame, and it reverse-charges phones. Second, the CY08 states no continuous video recording time at all — that gap is normal, and it is the number to ask for in writing before you quote it.
Audio: the second complaint
Smart glasses play sound through open-ear speakers, so the audio leaks — and the wearer cannot hear it over street noise. The Razer review above is blunt: fine for a quiet office, useless for a podcast in ambient noise. And the controls matter as much as the speakers: that buyer could not control volume or pause audio from the device, and the touch controls skipped through songs with the wrong touch.
Check three things on the sample: volume and pause controls on the frame, sound leakage at arm's length, and call quality with background noise. The HD5 Ultra answers with ENC dual-microphone noise reduction and metal physical buttons; the X01 with slide-to-adjust volume, wear detection auto-pause, and dual silicon-mic noise cancellation.
Privacy and the camera
A camera on a pair of glasses is not easily noticeable, and people nearby cannot tell when a photo or clip is being taken. One owner on Hacker News says they feel compelled to remove the glasses whenever they interact with people, and assumed captured voice and video would be sent to the maker's servers for model training.
Ask the supplier: is there a visible recording indicator? What is the longest single video clip — the HD5 Ultra and the X01 both cap one recording at 12 minutes. And where does the AI processing happen — on the device, or in the cloud?
Seven checks before you order
- Frame battery vs case battery, as separate numbers — the HD5 Ultra states both, and its case recharges the frame in 40 minutes.
- Music hours vs recording minutes — the X01 states 6–7 hours of music and 50 minutes of video recording. If the sheet states only music, ask for the recording minutes in writing.
- How the glasses charge. A case beats a cable per arm — and the X01's case charges in about 2 hours and doubles as a phone power bank.
- Controls on the frame. Volume, pause and a physical button beat touch-only — test them wearing the glasses.
- Weight. The HD5 Ultra weighs 35g, inside the 35–50g range of everyday spectacles — the RayNeo X3 Pro measured about 76g in reviews.
- Privacy. Recording indicator, clip length cap, and where AI processing happens — in writing.
- Warranty, read properly. RayNeo's 12-month warranty covers free repair for quality issues but excludes physical damage, liquid exposure and normal wear — and for eyewear worn daily, a drop is the most common damage. Ask what your model's warranty covers before you promise anything to your buyer.
Featured model: the HD5 Ultra
The HD5 Ultra AI smart glasses show the category at its most complete for the price: an 8MP camera (3280×2464) with anti-shake photo and video, a Bluetrum BT8961C5 chip with an Allwinner V821L2 coprocessor, a 300mAh frame battery with a 2000mAh charging case, about 11 hours of continuous music, 120 minutes of audio recording, and a full charge in 40 minutes via the case. The frame is TR90 with a metal hinge and metal physical buttons, at 35g and 168×150mm, IP65 dust, water and sweat resistant, with 26-language translation and voice wake-up through the AIbuds app.
For the camera side of the category, read our camera glasses guide, which covers the CY08 in detail.
Frequently asked questions
How long do smart glasses last on a charge?
The HD5 Ultra plays music for about 11 hours from its 300mAh frame battery and 2000mAh case; the X01 plays 6–7 hours of music and records video for 50 minutes; the CY08 plays about 9 hours of music at 80% volume. Recording drains the battery far faster than music.
Can you charge smart glasses while wearing them?
No — the glasses charge in their case or on a cable, not on your face. The HD5 Ultra recharges fully in 40 minutes via its case; the X01's 3600mAh case holds about 15 full charges but takes about 2 hours to fill.
Do smart glasses work without a phone?
Most functions need the paired phone and the companion app — the HD5 Ultra runs through the AIbuds app. Translation, photo transfer and AI features all run through the phone, so check the app's language support and phone versions before you order.
Talk to HnThai about your smart glasses order
HnThai is a sourcing partner based in Huaqiangbei, Shenzhen. We test frame battery, case capacity, audio leakage and recording time on the sample, and we put the battery numbers in writing in your quotation. See the full range on our smart glasses page or contact us.
