# Comparable Consumer Devices — Battery Size and Runtime

| | |
|---|---|
| **Document** | Market reference — battery capacity and runtime of comparable devices |
| **Compiled** | 2026-08-05 (web sources as of this date) |
| **Companion to** | [requirements-v0.2.md](requirements-v0.2.md) §D (power budget), §N.1 (battery decision) |
| **Purpose** | Ground AURA-1's 220/300 mAh and ≥ 16 h targets against shipping products |

> Figures marked **(claimed)** are manufacturer marketing numbers, not measured.
> Figures marked **(unverified)** come from low-quality sources and should be
> re-checked against a teardown before being used in any derivation.

---

## 1. Neckbands (AURA-1's direct form-factor class)

| Device | Battery | Playback | Notes |
|---|---|---|---|
| **OnePlus Bullets Wireless Z2 ANC** *(reference product)* | 220 mAh ≈ 814 mWh | 28 h ANC off · 20 h ANC on (claimed) | 26.65 g; 10 min charge → 20 h; the AURA-1 baseline (§0.1) |
| Sony WI-1000XM2 | not published | 10 h ANC on (claimed) | Premium ANC neckband; 10 min charge → 80 min |
| JBL Tune 125BT | not published | 16 h, no ANC (claimed) | Budget class; 15 min charge → 1 h |
| OPPO Enco M32 / M33 | ~220 mAh class | ~28 h (claimed) | Same India-market class as the Bullets Z2; specs sparsely documented |
| Realme Buds Wireless 3 | not published | ~40 h, ANC off (claimed) | Verify before use — versus.com lists battery as unknown |

**Takeaway:** the neckband class clusters around 200–250 mAh and 20–30 h BT-only
playback, i.e. ~30–40 mW system draw. AURA-1's §D.1 derivation (29 mW ANC-off,
41 mW ANC-on) sits exactly in this cluster.

---

## 2. TWS earbuds (adjacent class — tighter budget than AURA-1)

| Device | Battery | Playback | Notes |
|---|---|---|---|
| Apple AirPods Pro 2 | earbud cell ~0.16 Wh class (teardown-reported) | 6 h ANC (claimed) · 30 h with case | |
| Apple AirPods Pro 3 | Apple does not publish; per-bud "340 mAh" circulating online is **(unverified)** and implausible for a bud this size | **8 h ANC** (claimed) · 24 h with case | +33% per-charge vs Pro 2 with 2× ANC depth — the current efficiency benchmark |
| IYO One (standalone AI TWS) | not published | > 16 h companion mode (claimed) · "less" in phone-free/Wi-Fi/LTE mode | Closest product-concept comparable; phone-free runtime notably unquantified by vendor |

**Takeaway:** an earbud runs ~5–10 mW-class system power off a ~50 mWh cell.
AirPods Pro 3 at 8 h ANC is the efficiency bar for audio subsystems. IYO's
refusal to quantify phone-free (radio-on) runtime is indirect evidence of how
hard the Wi-Fi/LTE idle-power problem is — exactly AURA-1's R-D.3.

---

## 3. AI wearables (the cautionary column)

| Device | Battery | Runtime | Power implied |
|---|---|---|---|
| Ray-Ban Meta Gen 1 | 154 mAh ≈ 570 mWh | ~4 h mixed use (claimed) | ~140 mW average |
| Ray-Ban Meta Gen 2 | not published (larger) | ~8 h typical (claimed), 48 h case | on-device assistant features explicitly battery-limited |
| Humane AI Pin | 650 mAh ≈ 2.4 Wh | ~4 h (+5 h booster) | **~600 mW average** — thermal throttling was widely reported; product failed |
| Samsung Galaxy Watch6 (context) | 425 mAh | ~1–1.5 days | smartwatch class for scale |

**Takeaway:** every failed or struggling AI wearable sits at 100–600 mW average
draw. Products that survive sit at 30–50 mW. AURA-1's all-features target
(48 mW = 814 mWh / 17 h) is deliberately on the surviving side of that line —
this table is the argument for why R-D.3 (4 mW Wi-Fi idle) is non-negotiable.

---

## 4. Derived reference points for AURA-1

| Quantity | Value | Source |
|---|---|---|
| Neckband-class system power, BT playback | 29–40 mW | §1 cluster |
| AURA-1 all-features average target | ≤ 48 mW (17 h @ 814 mWh) | R-D.1 |
| AURA-1 @ 300 mAh stretch | ≤ 48 mW → 23 h | §N.1 |
| "AI gadget death zone" | ≥ 100 mW average | §3 |
| Best-in-class TWS ANC efficiency | 8 h from a ~50–60 mWh-class bud cell | AirPods Pro 3 |

---

## Sources

- Apple AirPods Pro 3 tech specs: https://support.apple.com/en-us/125135
- AirPods battery comparison 2026: https://www.ecoflow.com/us/blog/airpods-battery-life-comparison
- AirPods Pro 3 battery breakdown: https://www.charjenpro.com/blogs/news/airpods-pro-3-battery-life-breakdown-of-the-hidden-trade-off
- GSMArena — AirPods Pro 3 case battery: https://m.gsmarena.com/the_case_of_the_new_apple_airpods_pro_3_has_a_smaller_battery-news-69437.php
- SoundGuys — best neckband earbuds: https://www.soundguys.com/best-wireless-neckband-earbuds-21808/
- RTINGS — best neckband headphones 2026: https://www.rtings.com/headphones/reviews/best/neckband
- Meta — Ray-Ban Gen 2 battery: https://about.fb.com/news/2025/09/ray-ban-meta-gen-2-better-battery-life-video-capture/
- Grepow — smart-glasses batteries (Gen 1 154 mAh): https://www.grepow.com/blog/how-to-choose-battery-for-smart-glasses.html
- Humane AI Pin battery (650 mAh): https://wearablexp.com/smart-wearables/humane-ai-pin-review/
- TechCrunch — Humane AI Pin up close: https://techcrunch.com/2023/11/09/humanes-ai-pin-up-close/
- IYO One official: https://www.iyo.ai/iyo-one
- TAdviser — IYO One: https://tadviser.com/index.php/Product:Iyo_One_(smart_headphones)
- OnePlus Bullets Wireless Z2 ANC: https://www.oneplus.in/oneplus-bullets-wireless-z2-anc