How Long to Charge an Ultralight FPV Drone Battery (2S, 750 mAh)?
Charging an Ultralight FPV Drone Battery (2S, 750 mAh) from empty to full takes about 16 min with its standard 30W charger. The battery holds roughly 5.55 Wh, and this page estimates the time for every common charger wattage, using the Lithium-ion (Li-ion / Li-Po) chemistry it actually uses.
Charge time calculator for Ultralight FPV Drone Battery (2S, 750 mAh)
Estimated charge time
16 min
Includes the slower li-ion taper phase above 80%.
Charge time by charger wattage
| Charger | Power | Full charge (0-100%) |
|---|---|---|
| Slow charger | 15W | 31 min |
| Standard charger | 30W | 16 min |
| Fast charger | 50W | 9 min |
Battery capacity: 5.55 Wh · Chemistry: li-ion
The Ultralight FPV Drone Battery is engineered to deliver the performance demands of high-speed acrobatic flying while maintaining the minimal weight profile essential for responsive freestyle maneuvers. Its li-ion chemistry offers reliable energy density across repeated charge cycles, making it well-suited to pilots who demand consistent power delivery during aggressive bank rolls, flips, and rapid directional changes. Because these sessions often drain the battery substantially in short bursts, many experienced pilots develop a disciplined charging routine between flights—charging immediately after landing helps maintain the battery's responsiveness and extends its lifespan over weeks of regular use.
Proper storage conditions are particularly important for this compact battery when not in active rotation. Keeping it at moderate charge levels in a cool, dry environment—rather than fully charged or fully depleted—preserves the li-ion cells and prevents the accelerated degradation that heat and extreme states of charge can cause. Pilots flying multiple batteries in sequence should allow brief intervals between charging sessions, as continuous back-to-back charging can elevate internal temperatures. Regular visual inspection for any swelling, discoloration, or damage to the connector is a simple but critical habit that prevents electrical faults and ensures safe operation during your next freestyle session.
With the fastest charger listed here (Fast charger, 50W) it takes about 9 min. With the slowest (Slow charger, 15W) it takes about 31 min. Extremely lightweight battery designed for ultra-compact FPV freestyle drones and acrobatic flying.
Frequently asked questions
- How long does it take to charge an Ultralight FPV Drone Battery (2S, 750 mAh)?
- From 0% to 100% with the standard 30W charger, it takes about 16 min. Using a faster charger shortens that; using a weaker one extends it, see the table above for exact numbers.
- How do I know when my Ultralight FPV Drone Battery is ready to fly again after charging?
- Most modern chargers designed for li-ion batteries will indicate a complete charge through a status light or display. For FPV flying, it's good practice to verify the battery feels cool to the touch after charging and to check that the voltage has stabilized—this ensures the charge cycle is truly finished and the cells are balanced. A fully charged battery delivers the snappiest control response and longest flight duration, which is crucial for demanding acrobatic maneuvers.
- What should I do if my battery feels warm or puffs slightly after charging?
- Slight warmth during or immediately after charging is normal with li-ion batteries, but any swelling or significant heat is a sign that something is wrong. If you notice puffing, stop using the battery immediately and allow it to cool in a safe, open area away from flammable materials. Swelling indicates internal stress in the cells and means the battery should be retired. Always inspect your battery visually before each flight—li-ion batteries must be handled responsibly to prevent safety hazards.
- How is this charge time calculated?
- We divide the energy needed (5.55 Wh times the percentage you're charging) by the charger's effective power, which is the charger's wattage times the battery chemistry's real-world charging efficiency (85% for Lithium-ion (Li-ion / Li-Po)). The same formula powers both this page and our API.
ChargeTimeCalculatorestimates are based on typical charger efficiency and battery chemistry, not a live connection to your device. Always follow your manufacturer's charging guidance.