- Seamless zero-millisecond DC cutover prevents router and modem reboot cycles during outages
- Dedicated dual 12V and single 9V DC output rails support multi-device networking setups
- Compact footprint at 4.33 x 2.87 x 0.98 in (110 x 73 x 25 mm) integrates cleanly into cramped network shelves
- Ultrasonically sealed chassis prevents battery replacement once internal 18650 cells degrade
- Lack of configurable float voltage keeps cells continuously at maximum charge potential
- 27W total maximum power envelope limits compatibility with high-draw Wi-Fi 6E/7 multi-band gateways
Overview
Dedicated multi-rail DC distribution anchors the Helilyco UPS301, routing simultaneous 12V and 9V outputs directly from a 7800mAh lithium-ion battery buffer to eliminate the efficiency penalties of double AC-to-DC conversion. Engineered around three internal 2600mAh 18650 cylindrical cells managed by an integrated analog protection circuit, the unit supplies up to 27W of combined continuous output across dual 12V DC ports and a dedicated 9V DC barrel connector. The continuous inline topology feeds connected loads directly while keeping the internal cells topped off via a 12V DC input, achieving a true zero-millisecond transfer state during power grid dropouts so that connected modems and optical network terminals avoid reboot cycles.
The exterior housing utilizes a lightweight ABS thermoplastic enclosure measuring 4.33 x 2.87 x 0.98 in (110 x 73 x 25 mm) and weighing 7.41 oz (210 g), prioritizing a compact desktop footprint at the expense of internal shock isolation or rubberized base footing. Thermal management depends entirely on passive convective heat dissipation through the perimeter seams of the sealed shell. While surface temperatures remain moderate during typical steady-state router loads drawing 6W to 12W, the enclosure warms noticeably when concurrently powering downstream gear and replenishing a fully discharged battery bank over its 5.5-hour recharge cycle. The unit operates strictly via hardware-level logic without a microcontroller data interface, relying on a four-LED state-of-charge gauge to communicate capacity in 25% increments.
In real-world deployment, the device delivers approximately 4 to 6 hours of sustained runtime for standard domestic routing hardware, shielding sensitive network stacks from utility brownouts and momentary voltage sags. However, the absence of active cell balancing communication or configurable float voltage thresholds means the lithium cells remain continuously held at peak charge potential when AC power is normal, which will inevitably accelerate cell capacity loss across multi-year deployments. Maintenance is strictly constrained by the ultrasonically sealed casing, precluding cell replacement when the internal battery pack eventually degrades and relegating the entire assembly to electronic waste once its charge retention drops.
Technical Specifications
| Model | Helilyco UPS301 |
| Battery Capacity | 7800 mAh / 28.86 Wh (3x 2600 mAh 18650 Lithium-ion Cells) |
| Total Output Power | 27W Maximum |
| DC Output Ports | 2x 12V DC (up to 2A each), 1x 9V DC (up to 1A) |
| DC Input Rating | 12V DC / 3A (5.5 x 2.1 mm Barrel Jack) |
| Transfer Time | 0 ms (Direct Inline DC Buffer) |
| Estimated Backup Runtime | 4 to 6 Hours (typical 6W to 10W network load) |
| Recharge Duration | Approx. 5.5 Hours |
| Capacity Indicator | 4-Stage LED State-of-Charge Display |
| Chassis Material | ABS Thermoplastic |
| Dimensions | 4.33 x 2.87 x 0.98 in (110 x 73 x 25 mm) |
| Weight | 7.41 oz (210 g) |
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At a Glance
How reliable is the Helilyco UPS301 Review: Zero-Cutover Inline DC Network Power according to Mizex audits?
Ideal for keeping modems and low-draw routers powered through brief electrical interruptions, provided you accept a disposable sealed unit with a finite multi-year lithium cell lifespan.
What are the known quirks or drawbacks of the Helilyco UPS301 Review: Zero-Cutover Inline DC Network Power?
Our reliability audit identified the following documented caveats:
- Ultrasonically sealed chassis prevents battery replacement once internal 18650 cells degrade
- Lack of configurable float voltage keeps cells continuously at maximum charge potential
- 27W total maximum power envelope limits compatibility with high-draw Wi-Fi 6E/7 multi-band gateways
What are the key engineering highlights of the Helilyco UPS301 Review: Zero-Cutover Inline DC Network Power?
The top strengths recorded in our evaluation include:
- Seamless zero-millisecond DC cutover prevents router and modem reboot cycles during outages
- Dedicated dual 12V and single 9V DC output rails support multi-device networking setups
- Compact footprint at 4.33 x 2.87 x 0.98 in (110 x 73 x 25 mm) integrates cleanly into cramped network shelves