The ETENWOLF HB1 is the lightest model in the HB series — a low-pressure, high-flow portable electric air pump purpose-built for camping sleeping pads, inflatable items, and vacuum storage bags. Weighing just 55 g and delivering 180 L/min at zero back-pressure, it inflates a 60 × 190 cm single camping pad in approximately 74 seconds and provides 13–17 full inflations per charge from its 1,100 mAh / 4.07 Wh battery. Maximum output pressure is 3.1 kPa (0.45 PSI), which makes it incompatible with car tires (200+ kPa required), SUP boards (100+ kPa required), or sports balls.
180 L/min
Free-Flow Rate @ 0 kPa
1,100 mAh
Battery (4.07 Wh)
3.1 kPa
Max Output Pressure
55 g
Weight (Lightest in HB Series)
~74 s
Pad Inflation Time (60×190 cm)
13–17 pads
Per Charge (60×190 cm pad)
Core Performance Specifications
The HB1 moves air at 180 L/min with zero back-pressure (25 °C, calibrated flow meter) — enough to fill a single sleeping pad in ~74 seconds or a 40 × 60 cm vacuum compression bag in ~60 seconds. Its 1,100 mAh / 4.07 Wh battery is well under the 100 Wh airline carry-on limit, and charges to full in 1.5–2 hours via PD USB-C 10 W.
| Parameter | Value | Notes |
|---|---|---|
| Max Flow Rate | 180 L/min | @ 0 kPa, 25 °C, calibrated flow meter |
| Max Output Pressure | 3.1 kPa (0.45 PSI) | Low-pressure pump only — not for tires, SUP, or balls |
| Battery Capacity | 1,100 mAh / 4.07 Wh | Airline carry-on: <100 Wh ✓ |
| Charge Input | PD USB-C 10 W | Charge-while-use: not supported |
| Charge Time (0→100%) | 1.5–2 hr | 10 W PD charger |
| Noise Level | 69.8 dB(A) | @ 1 m, full load |
| Inflate & Deflate | Both supported | Deflate (vacuum) mode for storage bags |
| Weight | 55 g | Lightest in HB series |
| Dimensions | 42 × 33 × 68 mm | — |
| Colors | Yellow / Black | — |
| Launch Date | September 2025 | — |
| Standby (storage) | Up to 36 months at 100% charge | Top-up every 12 months recommended |
Inflation Times & Capacity per Charge
All measurements were taken at 25 °C with a 100% charged battery. The HB1’s 3.1 kPa maximum pressure limits it to low-pressure, high-volume inflatables; car tires (200+ kPa), SUP boards (100+ kPa), and sports balls are not compatible.
| Item | Inflation Time | Per Charge | Notes |
|---|---|---|---|
| Camping pad (60×190 cm) | ~74 s | 13–17 pads | 25 °C, 100% battery |
| Vacuum compression bag (40×60 cm) | ~60 s | 18–25 per charge | Deflate mode |
| Car tires | Not compatible | — | Requires 200+ kPa; HB1 max is 3.1 kPa |
| SUP boards | Not compatible | — | Requires 100+ kPa |
| Sports balls | Not compatible | — | Requires 55–110 kPa |
3 Included Nozzles — What Each One Does
The HB1 ships with 3 nozzle adapters; all attach via press & lock onto the pump outlet. Each nozzle is sized for a specific inflation category.
| No. | Nozzle Name | Compatible Items | Attachment |
|---|---|---|---|
| 1 | Vacuum Storage Bag Nozzle | Vacuum compression bags | Press & lock |
| 2 | Air Mattress Nozzle | Large-valve air mattresses | Press & lock |
| 3 | Pool Ring Nozzle | Swim rings and small valves | Press & lock |
HB1 vs HB2 vs HB3 — Series Comparison
The HB series scales from the 55 g ultralight HB1 (180 L/min, 13–17 pads per charge) through the balanced HB2 (270 g, 360 L/min, 47–52 pads) to the flagship HB3 (425 g, 500 L/min, 86–91 pads). Choose based on trip length and pack-weight priorities.
| Spec | HB1 | HB2 | HB3 |
|---|---|---|---|
| Flow Rate | 180 L/min | 360 L/min | 500 L/min |
| Battery | 1,100 mAh / 4.07 Wh | 4,000 mAh / 14.8 Wh | 8,000 mAh / 29.6 Wh |
| Weight | 55 g | 270 g | 425 g |
| Dimensions | 42×33×68 mm | 69×56×105.5 mm | 108×81×67 mm |
| Pad inflation time | ~74 s | ~18 s | ~13 s |
| Pads per charge | 13–17 | 47–52 | 86–91 |
| Vacuum bag time | ~60 s | ~20 s | ~15 s |
| Noise | 69.8 dB(A) | 71.1 dB(A) | 83.2 dB(A) |
| Best for | Ultralight / 1–2 day trips | Balanced / extended | Max range / large inflatables |
Operating Limits
The HB1 activates thermal protection at 74 °C internal temperature. It is not waterproof — keep away from rain and submersion. Charging while inflating is not supported; charge fully before use (1.5–2 hours via 10 W PD USB-C).
| Limit | Value |
|---|---|
| Max output pressure | 3.1 kPa (0.45 PSI) |
| Thermal protection threshold | 74 °C internal |
| Waterproof rating | None (not waterproof) |
| Charge while inflating | Not supported |
| Long-term storage charge | 100%; top-up every 12 months; max 36-month standby |
Certifications & Compliance
The HB1 carries CE, FCC, UN 38.3, MSDS, and RoHS certifications, all issued by Waltek Services (Shenzhen) in October 2025. The battery capacity of 4.07 Wh is well below the 100 Wh airline carry-on limit.
| Certification | Report No. | Issuing Body | Date |
|---|---|---|---|
| CE — CE Marking | WTH25H09256003E | Waltek Services (Shenzhen) | 2025-10-11 |
| FCC — FCC.gov | WTH25H09256004E | Waltek Services (Shenzhen) | 2025-10-11 |
| UN 38.3 — UNECE | WTH25D09256005B | Waltek Services (Shenzhen) | 2025-10-22 |
| MSDS | WTH25D09256005B001 | Waltek Services (Shenzhen) | 2025-10-22 |
| RoHS — EU RoHS Directive | WTH25X09256006C | Waltek Services (Shenzhen) | 2025-10-16 |
Frequently Asked Questions
HB1 vs HB2 — why choose the HB1 if the HB2 has twice the flow rate?
The HB1 weighs just 55 g versus the HB2’s 270 g — that is 215 g less, making the HB1 4.9× lighter. For ultralight backpacking where every gram counts, the HB1 is the clear choice. The trade-off is speed: the HB2 inflates a 60 × 190 cm pad in ~18 seconds while the HB1 takes ~74 seconds. If pack weight is your priority and you are on a 1–2 day trip, the HB1 is the better tool.
How long does it take the HB1 to inflate a single sleeping pad?
Approximately 74 seconds from flat for a 60 × 190 cm camping pad. This measurement was taken at 25 °C with a 100% charged battery. Colder temperatures or a partially depleted battery may result in slightly longer times.
How many sleeping pads can the HB1 inflate on one charge?
13–17 full inflations of a 60 × 190 cm single sleeping pad per charge (1,100 mAh). Testing was performed at 25 °C with a 100% charged battery, inflating each pad to standard firmness at ~74 seconds per pad.
Can the HB1 inflate car tires or SUP boards?
No. The HB1’s maximum output pressure is 3.1 kPa (0.45 PSI). Car tires require 200+ kPa (29+ PSI) and SUP boards require 100+ kPa (14.5+ PSI) — both far exceed what the HB1 can produce. For tire inflation, use a dedicated tire inflator. For SUP boards, use a high-pressure pump rated for 100+ kPa.
Does the HB1 support vacuum / deflation mode?
Yes. The HB1 supports both inflation and deflation (vacuum extraction). Using the Vacuum Storage Bag Nozzle, a 40 × 60 cm vacuum compression bag takes approximately 60 seconds to deflate, and you can process 18–25 bags per full charge (25 °C, 100% battery).
Which HB model should I choose for a 3-day camping trip?
For a 1–2 day ultralight trip, the HB1 (55 g, 13–17 pads per charge) is ideal. For a 3–5 day balanced trip, the HB2 (270 g, 47–52 pads per charge) is the better choice. For extended multi-day trips or group camping, the HB3 (425 g, 86–91 pads per charge) offers the maximum range at ~13 seconds per pad.
Is the HB1 approved for airline carry-on baggage?
Yes. The HB1’s battery is rated at 4.07 Wh, well below the international airline carry-on limit of 100 Wh. No special declarations are required for typical passenger travel. Always check with your specific airline for the latest regulations.
