Best Battery Options for Goosky S2 and Goosky S2 Ultra
The Goosky S2 and Goosky S2 Ultra are designed around a 3S 11.1V LiPo battery, with the factory configuration using approximately 750mAh of capacity. That detail is important because not every battery that physically fits should be treated as an equal replacement.
The batteries in this collection serve three different purposes:
- A 3S 350mAh pack for very light, short-duration flying and quick practice sessions.
- A 3S 450mAh pack for pilots who still want a lightweight setup but prefer more usable flight time than the 350mAh option.
- A 3S 750mAh pack for pilots seeking capacity and flying weight closer to the original Goosky battery.
The 350mAh and 450mAh packs should therefore be viewed as lightweight alternatives, while the 750mAh battery is the more natural starting point for normal sport flying, longer practice sessions, and sustained 3D use.
350mAh vs 450mAh vs 750mAh: Which Goosky S2 Battery Should You Choose?
| Capacity | Best Use | Flight Character | Important Note |
|---|---|---|---|
| 350mAh 3S | Short practice flights | Lightest and quickest response | Much shorter runtime than the factory 750mAh pack |
| 450mAh 3S | Light sport flying and short 3D sessions | Light and agile with slightly more endurance | Still not a runtime-equivalent replacement for 750mAh |
| 750mAh 3S | Regular sport flying and sustained 3D | Closer to the intended flying weight and capacity | Confirm fit because the new pack uses a longer, narrower case |
Choose the smaller packs when reducing weight matters more than flight duration. Choose the 750mAh option when you want a setup that more closely follows Goosky’s original capacity specification.
A 750mAh Battery Is the Closest Match to the Factory Goosky Setup
Both the Goosky S2 Max and Goosky S2 Ultra are normally supplied with a 3S 750mAh battery. A replacement with the same nominal capacity will therefore offer a more comparable energy reserve than a 350mAh or 450mAh pack, although actual flight time still depends on head speed, collective use, flying style, battery condition, and Rotorflight governor settings.
The new CNHL 750mAh battery measures approximately 78 × 21 × 22mm and weighs around 61g. Its weight is close to the original battery class, while its narrow 21mm width and 22mm height appear suitable for the slim S2 battery area.
Its main difference is length. At 78mm, this battery uses a longer and narrower shape than many third-party S2 batteries, which are commonly built in a shorter, wider format. The open-front layout visible on the Goosky airframe suggests that the extra length may be usable, but final compatibility depends on the available insertion depth, canopy clearance, connector position, and how securely the battery can be retained.
Are 350mAh and 450mAh Batteries Suitable for the Goosky S2?
A smaller battery may fit and power the helicopter correctly because the voltage remains 3S 11.1V, but capacity directly affects available flight time. A 350mAh or 450mAh pack cannot be expected to provide the endurance of the original 750mAh battery.
The reason to choose one of these smaller packs is not longer runtime. It is reduced flying weight. A lighter battery can make the helicopter feel quicker during direction changes and easier to move through short, repetitive practice sequences. This may suit pilots working on basic aerobatics, hovering orientations, or short 3D drills where several brief flights are preferred over one longer flight.
Because these packs are substantially lighter than the original battery, pilots should check the helicopter’s center of gravity before takeoff. The battery must also be secured firmly enough that it cannot move during rapid collective changes, inverted flight, or hard landings.
Battery Dimensions Matter as Much as Capacity
Capacity alone does not determine whether a battery fits the Goosky S2 or S2 Ultra. Two 750mAh batteries can have very different shapes. One may be short and wide, while another may be long and narrow.
Before flying a new battery, check the following:
- The battery can slide into position without forcing the carbon frame or canopy.
- The XT30 connector and power wires are not sharply bent, pinched, or pressed against the canopy.
- The battery can be secured against forward and rearward movement.
- The balance lead cannot reach the motor, gears, servos, or rotating components.
- The helicopter balances correctly after installation.
A battery should never be selected only because the connector matches. Secure physical installation and correct center of gravity are equally important.
Why Battery Quality Matters with Rotorflight
The Goosky S2 Ultra uses a Rotorflight-based flight controller with detailed tuning, governor control, telemetry support, and Blackbox data recording. Rotorflight does not require a special battery chemistry, but consistent battery voltage helps the power system maintain more predictable head speed under changing collective load.
During tic-tocs, funnels, pitch reversals, and rapid direction changes, the main and tail motors can demand current in short, repeated bursts. A battery with reliable output will generally provide a more consistent feel than a weak or heavily aged pack, even when both batteries show the same capacity on the label.
However, a high discharge rating does not replace capacity. A strong 450mAh battery may feel responsive during a short flight, but it still contains less energy than a 750mAh pack and should not be described as providing equivalent runtime.
Goosky S2 vs Goosky S2 Ultra Battery Requirements
From a battery-selection perspective, the Goosky S2 and Goosky S2 Ultra share the same basic foundation: 3S voltage, an XT30-style connector, low installed weight, and a compact battery shape.
The S2 Ultra adds a carbon-fiber chassis, metal servos, upgraded direct-drive hardware, split electronics, and a Rotorflight flight controller. These improvements increase tuning flexibility and performance potential, but they do not change the fact that Goosky designed the helicopter around a 750mAh-class power source.
Pilots can experiment with smaller packs to change the helicopter’s weight and response, but the 750mAh option remains the more appropriate reference point when comparing normal flight duration and overall balance.
More CNHL Batteries for Micro RC Helicopters
Different micro helicopters use different battery dimensions, capacities, and connectors. Before moving a battery between models, always compare voltage, physical size, weight, connector type, and center-of-gravity requirements.
- Browse lightweight packs for compact helicopter platforms in the Micro Helicopter Batteries collection.
- Explore larger capacities and higher-voltage options in the CNHL Helicopter Batteries collection.
- Learn more about the helicopter, Rotorflight system, hardware upgrades, and receiver compatibility in our Goosky S2 Ultra review.
Goosky S2 and Goosky S2 Ultra Battery FAQ
Q: What battery does the Goosky S2 Ultra use?
A: The Goosky S2 Ultra is designed for a 3S 11.1V LiPo battery and is normally supplied with a 750mAh pack.
Q: Can a 350mAh or 450mAh battery match the stock flight time?
A: No. These lower-capacity packs contain less energy and will provide shorter flight times. Their main advantage is reduced weight and a lighter flying feel.
Q: Is the new CNHL 750mAh battery the closest replacement option?
A: It is the closest option in this collection by nominal capacity and weight. Its dimensions are approximately 78 × 21 × 22mm, so canopy clearance, wire routing, retention, and center of gravity should be confirmed before flying.
Q: Does the Goosky S2 use a 3S or 4S battery?
A: It uses a 3S 11.1V LiPo battery. A 4S battery should not be used unless Goosky specifically approves a 4S power-system conversion.
Q: What connector does the Goosky S2 use?
A: The Goosky S2 family uses an XT30-style connector. XT30U-equipped CNHL batteries are physically compatible with standard XT30 connections.
Q: Where can I learn more about the Goosky S2 Ultra?
A: Read our complete
Goosky S2 Ultra review
for a closer look at Rotorflight, the carbon frame, metal servos, electronics, receiver support, and flight performance.
