The Flywoo EasyPower E16 charger is designed for charging 1S LiHV batteries, with a focus on affordability, convenience, and efficiency. It supports both charging and storage modes, and its plug-and-play operation makes it ideal for beginners and casual users. However, there are some limitations and concerns you should be aware of before buying, which we’ll cover in this review.
Check out my Tiny Whoop buyer’s guide, including accessories and battery recommendations: https://oscarliang.com/best-tiny-whoop/
Table of Contents
Where to Buy
Get the Flywoo EasyPower 1S Charger here: https://oscarliang.com/link-n5y4
If you don’t already have a compatible USB-C power adapter, consider getting the Flywoo 65W GaN Charger available as an option on the product page to ensure proper power delivery.
Specifications
- Input Interface: USB Type-C
- Input Voltage: 9V–20V (supports PD3.0 protocol)
- Minimum Input Power: 45W
- Max Charging Current: 1.5A × 6 ports
- Battery Connectors: A30 / PH2.0 / BT2.0
- Battery Type Supported: LiHV (4.35V)
- Dimensions: 88 × 54 × 26.5 mm
- Weight: 63.5 g
Close Look at the Design
The Flywoo EasyPower E16 is a straightforward and compact 1S battery charger. There’s no screen—just a single button that toggles between two modes:
- Charging mode (LED turns red)
- Storage mode (LED turns blue)
Because it lacks a display, you can’t monitor individual cell voltages. The only status indicator is the LED, which turns green when charging is complete.
Each of the six ports supports both A30 and PH2.0 connectors, allowing simultaneous charging of up to 6 batteries. Just plug them in—no button presses required. The charger automatically begins charging (or storage charging) based on the selected mode.
One significant limitation of the E16 is its fixed charging current of 1.5A per port. While this is usually fine for larger 1S batteries like 750mAh or 1000mAh, it might be too high for smaller cells such as 300mAh and 450mAh.
Charging these small batteries at 1.5A might cause them to get hot, which could reduce lifespan or even create a safety risk. For these batteries, it’s highly recommended to monitor their temperature closely during charging. The lack of current adjustability is a big drawback for those who fly smaller whoops.
When it’s in storage mode, if the battery is above 3.85V, it discharges the battery, but extremely slowly. In 1 hour, it discharged my 1S 450mAh LiHV from 4.35V to only 4.07V.
The E16 requires a PD USB-C power source (9V to 20V) with at least 45W output. If you don’t already own a suitable adapter, Flywoo offers a 65W GaN USB-C charger on their site, which is a reliable option to ensure compatibility and optimal performance.
Pros
- Extremely easy to use – Just plug in your batteries and it starts charging automatically.
- Includes storage mode – Can both charge and discharge batteries to safe storage voltage.
- Affordable – Great value for beginners or pilots on a budget.
Cons
- No screen – You can’t see battery voltages or monitor charging progress.
- No adjustable settings – Fixed charging parameters with no option to change current or mode per port.
- Fixed charge current at 1.5A – Might be too high for smaller packs like 300mAh, which may lead to overheating and reduced lifespan.
- Only supports LiHV (4.35V) – Not suitable for standard LiPo batteries (4.20V max). Charging regular LiPo cells on this charger can be dangerous. That said, almost all 1S batteries nowadays are LiHV, so this won’t be an issue for most users.
- No independent port control – All ports use the same mode.
- Uses A30 connectors – A30 connectors have a tongue inside the connector, which can make it harder to plug in BT2.0 batteries. Flywoo could have used BT2.0 connectors (which are compatible with A30), but likely avoided it to bypass licensing fees.
- Only USB-C input – No XT60/XT30 input, so you can’t power it from a battery unless you use a PD-compatible USB-C power bank or adapter, which limits its flexibility.
- No audible alerts – No beeps when charging completes.
- Slow discharge – If you want to storage-charge a fully charged pack, the discharging is slow. It could take several hours to complete.
How to Use
It couldn’t be easier:
- Plug in a USB-C PD power supply.
- Press the button to select Charge or Storage mode (LED turns red or blue).
- Plug in your 1S batteries – charging starts automatically. That’s it!
Here’s the manual that comes with the charger.
Testing
Input Power Draw (Charging 6 Batteries)
- Draws 1.7A at 20V (~34W total),
- That’s roughly 1.3A per port – slightly under the rated 1.5A.
End Voltages (Storage Mode)
| Port | 3.85V (Storage Mode) |
| 1 | 3.844 |
| 2 | 3.849 |
| 3 | 3.847 |
| 4 | 3.840 |
| 5 | 3.848 |
| 6 | 3.848 |
End Voltages (Charge Mode)
| Port | 4.35V (Charge Mode) |
| 1 | 4.348 |
| 2 | 4.352 |
| 3 | 4.347 |
| 4 | 4.339 |
| 5 | 4.350 |
| 6 | 4.340 |
Voltage accuracy appears to be decent for both charging and storage modes.
Conclusion
If you’re looking to spend as little as possible on a charger for your 1S LiHV batteries, the Flywoo EasyPower E16 is worth considering. It’s basic, reliable, and gets the job done.
However, if you have the budget, there are better chargers out there with more features, better safety, and flexibility—such as the GEPRC WooPower or the Vifly WhoopStor. The Flywoo EasyPower E16 is a good choice for users who often fly larger 1S packs and want something that’s cheap and easy to operate.
Get the Flywoo EasyPower 1S Charger here: https://oscarliang.com/link-n5y4