Sub250 Nimble65 HD O4
Sub250
NewBeeDrone's 65mm take on 1S O4
Sub250's Nimble65 HD O4 is a 65mm 1S brushless tiny whoop carrying a full DJI O4 (Lite) Air Unit — at 27±1g bare, one of the lightest ways to fly native DJI digital HD indoors, for pilots who value HD footage over raw agility.
Sub250 revised the Nimble65 HD O4 to add a dedicated built-in 1S boost BEC for the O4 unit; the current listing is titled "Built in with BEC," which identifies the updated hardware revision.
Original pre-BEC units power the O4 Air Unit directly from the 1S battery and can show video instability or total signal loss when pack voltage sags below about 3.7V. Older third-party stock may still be the unrevised version; follow-up reviews confirm the BEC revision fixes the brownouts.
US retail pricing runs above Sub250's direct price for the same variants. Direct orders ship DHL/UPS from China in a quoted 10-15 days, with duties on the buyer.
The full story
The Nimble65 HD O4 launched in January 2025 alongside DJI's O4 release, carrying the standard O4 Air Unit (the "Lite," not the O4 Pro) on a 65mm 1S frame. That unit gives it onboard 4K/60fps recording from a 1/2-inch CMOS sensor and 1080p/100fps low-latency live view, with no separate HD camera needed.
The powertrain is Sub250 0702 27000KV motors on HQ 1.2x0.9x3 (31mm) tri-blade props, driven by a Redfox A1 5A (STM32F411, ICM42688-P) with an A30 connector. Claimed endurance is 2 min 30 s on the recommended 1S 300mAh pack. Hauling a full O4 unit with this setup leaves it underpowered for its weight — Oscar Liang's O4 micro comparison judged it "sluggish performance, poor responsiveness."
The original release powered the O4 directly from the 1S pack, causing voltage-sag brownouts and video dropouts serious enough that Oscar Liang said he could not recommend it. Sub250 revised the product with a dedicated built-in 1S boost — the current listing is titled "Built in with BEC" — and follow-up reviews confirmed the brownouts are fixed.
It sells in 2.4GHz or (DJI remote) receiver variants. The ELRS receiver is SPI-based on the Redfox AIO rather than a true module, so it is tied to Betaflight's implementation and slower to receive ELRS firmware features. Ecosystem support is solid: standard 25.5x25.5mm mounting, a common F411/ICM42688-P AIO stack, and individual spares — frames, hoods, props, motors, batteries — sold by Sub250.
Pros & cons
Pros
- Among the lightest full DJI O4 digital HD whoops available at 27±1g bare weight on a 65mm 1S frame
- Onboard 4K/60fps recording and 1080p/100fps low-latency live view from the DJI O4 Air Unit's 1/2-inch CMOS sensor — no separate HD camera needed
- Current revision adds a dedicated built-in 1S boost BEC for the O4 unit, fixing the brownout/video-dropout problem of the original release (reviewer-confirmed 'no more brownouts')
Show all 5 pros
- Sold in ELRS 2.4GHz or PNP (DJI remote) variants at the same price direct from Sub250
- Standard 25.5x25.5mm VTX mounting pattern and common F411/ICM42688-P AIO stack, with individual spare parts (frames, hoods, props, motors, batteries) sold by Sub250
Cons
- Underpowered for its weight: 0702 27000KV motors on 31mm props hauling an O4 unit drew a 'sluggish performance, poor responsiveness' verdict and a do-not-recommend from Oscar Liang's O4 micro comparison
- Original (pre-BEC) units power the O4 directly from the 1S battery and suffer video instability or total signal loss when pack voltage sags below ~3.7V — old third-party stock may still be the unrevised version
- Short claimed flight time of about 2 min 30 s on the recommended 1S 300mAh pack
Show all 5 cons
- ELRS receiver is SPI-based (integrated on the Redfox A1 AIO), not a true UART ELRS module — tied to Betaflight's SPI implementation and slower to receive ELRS firmware features
- US retail pricing runs above Sub250 direct, while direct orders ship DHL/UPS from China in a quoted 10-15 days with duties on the buyer
Specs
Retailers & price history
| Retailer | Current | Stock | Lowest confirmed | Highest confirmed | Checked |
|---|---|---|---|---|---|
| Sub250 (direct) | $229.99 | In stock | $229.99 (2026-07-02) | $229.99 (2026-07-02) | 2026-07-04 |
| Pyrodrone | $292.99 | In stock | $292.99 (2026-07-02) | $292.99 (2026-07-02) | 2026-07-04 |
| RaceDayQuads | $275.99 | Sold out | $275.99 (2026-07-02) | $275.99 (2026-07-02) | 2026-07-04 |
Current = cheapest ready-to-fly configuration (video system included, ELRS) tracked at that retailer; sold-out rows show the last listed price. Lowest/highest are from every confirmed scan since 2026-07-02 — the log grows with each stock check.
Replacement parts & batteries
Crash spares that fit this model, checked against the shops like everything else. Batteries show three price tiers — $ lowest, $$ middle, $$$ highest — among compatible in-stock packs.
Batteries
| Part | Price | Availability |
|---|---|---|
| Sub250 1S 300mAh 75C LiHV (A30) $ 1S 300mAh 75C LiHV · A30 · 8.4g |
$4.99 | In stock at Sub250 (direct) |
| GNB 1S 300mAh 60C LiHV (A30, cabled) $$$ 1S 300mAh 60C LiHV · A30 cabled · 7g |
$5.99 | In stock at Pyrodrone |
Props
| Part | Price | Availability |
|---|---|---|
| HQ Prop Ultralight 31mmx3 Tri-Blade 4 Pack (1mm shaft) HQ 31mm tri-blade · 1mm shaft · PC · 4 props |
$2.25 | In stock at NewBeeDrone |
Motors
| Part | Price | Availability |
|---|---|---|
| Sub250 0702 27000KV Motor 0702 27000KV · 1S · single or 4 pack |
$13.00 | In stock at Sub250 (direct) |
Frames
| Part | Price | Availability |
|---|---|---|
| Nimble65 O4 Bottom Frame 65mm ducted bottom frame · 4 colors (pair with upper hood for complete frame) |
$4.99 | In stock at Sub250 (direct) |
Canopies
| Part | Price | Availability |
|---|---|---|
| Nimble65 Upper Hood (canopy) Upper hood/canopy · 4 colors incl. transparent |
$3.99 | In stock at Sub250 (direct) |
Video
| Part | Price | Availability |
|---|---|---|
| DJI O4 Air Unit (standard) Standard O4 air unit · 1080p/100fps link · 4K/60 onboard · single antenna |
$119.00 | In stock at Sub250 (direct) |
Chargers
| Part | Price | Availability |
|---|---|---|
| Sub250 CW1 1S Charger (A30 + PH2.0) 1S LiPo/LiHV charger · native A30 + PH2.0 ports · USB-C input · voltage display + full-charge buzzer |
$10.99 | In stock at Sub250 (direct) |
| Flywoo 6-Port 1S Battery Charger (A30/PH2.0) 6-port 1S LiPo/LiHV charger board · native A30 + PH2.0 · 4.2V/4.35V selectable |
$19.99 | Sold out at GetFPV |
Other spares
| Part | Price | Availability |
|---|---|---|
| Nimble65 O4 Print Parts (air-unit mount set) Printed O4 air-unit mounting parts for the Nimble65 O4 |
$4.99 | In stock at Sub250 (direct) |
| Sub250 1S BEC Board V1 for O4 1S boost BEC board for powering a DJI O4 air unit |
$6.99 | In stock at Sub250 (direct) |