Name: 721855 500mAh 3.7V Li-Po Battery with JST Connector for UDI U818A, UDI U818A-1, Feilun H07N RC Drones
SKU: 721855-JST
Availability: InStock

Question 1

Frequently Asked Questions

Accepted Answer

Frequently Asked Questions

Question 2

Which RC drones are compatible with the 721855 battery?
                    +
                

                
                    The 721855 battery for UDI U818A is designed for drones that use a 1S 500mAh 3.7V Li-Po cell with a JST connector. Compatible models include UDI U818A, UDI U818A-1, and Feilun H07N. It is also compatible with the UDI U819A, and can serve as a replacement for the WLtoys V966 and V977 series when the correct JST connector is verified. Please check your drone's original battery size (approx. 55 × 18 × 7.2mm) and connector type before ordering.
                
            
                                
            
                
                    What is the capacity and flight time of this battery?
                    +
                

                
                    The 721855 500mAh 3.7V Li-Po battery has a typical capacity of 500mAh (1.85Wh) and a nominal voltage of 3.7V. The charge limit voltage is 4.2V. With a 500mAh capacity, the UDI U818A provides approximately 7-9 minutes of flight time per charge. For best results and to maximize cycle life, always use a dedicated 1S Li-Po balance charger set to 4.2V with a charge current of 0.5-1A. The battery features overcharge, over-discharge, and short circuit protection and is CE, RoHS, and UN38.3 certified.
                
            
                                
            
                
                    How do I safely charge and maintain this Li-Po battery?
                    +
                

                
                    Li-Po batteries require safe handling to prevent fire risks. Always charge with a dedicated 1S Li-Po balance charger set to 4.2V. Never exceed the 1C charge current of 500mA. Never leave the battery unattended while charging. Land your drone immediately when voltage drops near 3.2V to prevent over-discharge. If the battery swells, stop using it and dispose of it properly. For long-term storage, keep the battery at 40%-60% charge (about 3.7-3.8V per cell) in a cool, dry place. If swelling or physical damage is observed, stop use immediately and dispose of at a battery recycling center.

Accepted Answer

Which RC drones are compatible with the 721855 battery?
                    +
                

                
                    The 721855 battery for UDI U818A is designed for drones that use a 1S 500mAh 3.7V Li-Po cell with a JST connector. Compatible models include UDI U818A, UDI U818A-1, and Feilun H07N. It is also compatible with the UDI U819A, and can serve as a replacement for the WLtoys V966 and V977 series when the correct JST connector is verified. Please check your drone's original battery size (approx. 55 × 18 × 7.2mm) and connector type before ordering.
                
            
                                
            
                
                    What is the capacity and flight time of this battery?
                    +
                

                
                    The 721855 500mAh 3.7V Li-Po battery has a typical capacity of 500mAh (1.85Wh) and a nominal voltage of 3.7V. The charge limit voltage is 4.2V. With a 500mAh capacity, the UDI U818A provides approximately 7-9 minutes of flight time per charge. For best results and to maximize cycle life, always use a dedicated 1S Li-Po balance charger set to 4.2V with a charge current of 0.5-1A. The battery features overcharge, over-discharge, and short circuit protection and is CE, RoHS, and UN38.3 certified.
                
            
                                
            
                
                    How do I safely charge and maintain this Li-Po battery?
                    +
                

                
                    Li-Po batteries require safe handling to prevent fire risks. Always charge with a dedicated 1S Li-Po balance charger set to 4.2V. Never exceed the 1C charge current of 500mA. Never leave the battery unattended while charging. Land your drone immediately when voltage drops near 3.2V to prevent over-discharge. If the battery swells, stop using it and dispose of it properly. For long-term storage, keep the battery at 40%-60% charge (about 3.7-3.8V per cell) in a cool, dry place. If swelling or physical damage is observed, stop use immediately and dispose of at a battery recycling center.

Question 3

Which RC drones are compatible with the 721855 battery?
                    +
                

                
                    The 721855 battery for UDI U818A is designed for drones that use a 1S 500mAh 3.7V Li-Po cell with a JST connector. Compatible models include UDI U818A, UDI U818A-1, and Feilun H07N. It is also compatible with the UDI U819A, and can serve as a replacement for the WLtoys V966 and V977 series when the correct JST connector is verified. Please check your drone's original battery size (approx. 55 × 18 × 7.2mm) and connector type before ordering.

Accepted Answer

Which RC drones are compatible with the 721855 battery?
                    +
                

                
                    The 721855 battery for UDI U818A is designed for drones that use a 1S 500mAh 3.7V Li-Po cell with a JST connector. Compatible models include UDI U818A, UDI U818A-1, and Feilun H07N. It is also compatible with the UDI U819A, and can serve as a replacement for the WLtoys V966 and V977 series when the correct JST connector is verified. Please check your drone's original battery size (approx. 55 × 18 × 7.2mm) and connector type before ordering.

Question 4

Which RC drones are compatible with the 721855 battery?
                    +

Accepted Answer

Which RC drones are compatible with the 721855 battery?
                    +

Question 5

+

Accepted Answer

+

Question 6

The 721855 battery for UDI U818A is designed for drones that use a 1S 500mAh 3.7V Li-Po cell with a JST connector. Compatible models include UDI U818A, UDI U818A-1, and Feilun H07N. It is also compatible with the UDI U819A, and can serve as a replacement for the WLtoys V966 and V977 series when the correct JST connector is verified. Please check your drone's original battery size (approx. 55 × 18 × 7.2mm) and connector type before ordering.

Accepted Answer

The 721855 battery for UDI U818A is designed for drones that use a 1S 500mAh 3.7V Li-Po cell with a JST connector. Compatible models include UDI U818A, UDI U818A-1, and Feilun H07N. It is also compatible with the UDI U819A, and can serve as a replacement for the WLtoys V966 and V977 series when the correct JST connector is verified. Please check your drone's original battery size (approx. 55 × 18 × 7.2mm) and connector type before ordering.

Question 7

What is the capacity and flight time of this battery?
                    +
                

                
                    The 721855 500mAh 3.7V Li-Po battery has a typical capacity of 500mAh (1.85Wh) and a nominal voltage of 3.7V. The charge limit voltage is 4.2V. With a 500mAh capacity, the UDI U818A provides approximately 7-9 minutes of flight time per charge. For best results and to maximize cycle life, always use a dedicated 1S Li-Po balance charger set to 4.2V with a charge current of 0.5-1A. The battery features overcharge, over-discharge, and short circuit protection and is CE, RoHS, and UN38.3 certified.

Accepted Answer

What is the capacity and flight time of this battery?
                    +
                

                
                    The 721855 500mAh 3.7V Li-Po battery has a typical capacity of 500mAh (1.85Wh) and a nominal voltage of 3.7V. The charge limit voltage is 4.2V. With a 500mAh capacity, the UDI U818A provides approximately 7-9 minutes of flight time per charge. For best results and to maximize cycle life, always use a dedicated 1S Li-Po balance charger set to 4.2V with a charge current of 0.5-1A. The battery features overcharge, over-discharge, and short circuit protection and is CE, RoHS, and UN38.3 certified.

Question 8

What is the capacity and flight time of this battery?
                    +

Accepted Answer

What is the capacity and flight time of this battery?
                    +

Question 9

+

Accepted Answer

+

Question 10

The 721855 500mAh 3.7V Li-Po battery has a typical capacity of 500mAh (1.85Wh) and a nominal voltage of 3.7V. The charge limit voltage is 4.2V. With a 500mAh capacity, the UDI U818A provides approximately 7-9 minutes of flight time per charge. For best results and to maximize cycle life, always use a dedicated 1S Li-Po balance charger set to 4.2V with a charge current of 0.5-1A. The battery features overcharge, over-discharge, and short circuit protection and is CE, RoHS, and UN38.3 certified.

Accepted Answer

The 721855 500mAh 3.7V Li-Po battery has a typical capacity of 500mAh (1.85Wh) and a nominal voltage of 3.7V. The charge limit voltage is 4.2V. With a 500mAh capacity, the UDI U818A provides approximately 7-9 minutes of flight time per charge. For best results and to maximize cycle life, always use a dedicated 1S Li-Po balance charger set to 4.2V with a charge current of 0.5-1A. The battery features overcharge, over-discharge, and short circuit protection and is CE, RoHS, and UN38.3 certified.

Question 11

How do I safely charge and maintain this Li-Po battery?
                    +
                

                
                    Li-Po batteries require safe handling to prevent fire risks. Always charge with a dedicated 1S Li-Po balance charger set to 4.2V. Never exceed the 1C charge current of 500mA. Never leave the battery unattended while charging. Land your drone immediately when voltage drops near 3.2V to prevent over-discharge. If the battery swells, stop using it and dispose of it properly. For long-term storage, keep the battery at 40%-60% charge (about 3.7-3.8V per cell) in a cool, dry place. If swelling or physical damage is observed, stop use immediately and dispose of at a battery recycling center.

Accepted Answer

How do I safely charge and maintain this Li-Po battery?
                    +
                

                
                    Li-Po batteries require safe handling to prevent fire risks. Always charge with a dedicated 1S Li-Po balance charger set to 4.2V. Never exceed the 1C charge current of 500mA. Never leave the battery unattended while charging. Land your drone immediately when voltage drops near 3.2V to prevent over-discharge. If the battery swells, stop using it and dispose of it properly. For long-term storage, keep the battery at 40%-60% charge (about 3.7-3.8V per cell) in a cool, dry place. If swelling or physical damage is observed, stop use immediately and dispose of at a battery recycling center.

Question 12

How do I safely charge and maintain this Li-Po battery?
                    +

Accepted Answer

How do I safely charge and maintain this Li-Po battery?
                    +

Question 13

+

Accepted Answer

+

Question 14

Li-Po batteries require safe handling to prevent fire risks. Always charge with a dedicated 1S Li-Po balance charger set to 4.2V. Never exceed the 1C charge current of 500mA. Never leave the battery unattended while charging. Land your drone immediately when voltage drops near 3.2V to prevent over-discharge. If the battery swells, stop using it and dispose of it properly. For long-term storage, keep the battery at 40%-60% charge (about 3.7-3.8V per cell) in a cool, dry place. If swelling or physical damage is observed, stop use immediately and dispose of at a battery recycling center.

Accepted Answer

Li-Po batteries require safe handling to prevent fire risks. Always charge with a dedicated 1S Li-Po balance charger set to 4.2V. Never exceed the 1C charge current of 500mA. Never leave the battery unattended while charging. Land your drone immediately when voltage drops near 3.2V to prevent over-discharge. If the battery swells, stop using it and dispose of it properly. For long-term storage, keep the battery at 40%-60% charge (about 3.7-3.8V per cell) in a cool, dry place. If swelling or physical damage is observed, stop use immediately and dispose of at a battery recycling center.

Compare	✅ Qingsm Tech	⚠️ eBay / AliExpress
Warranty Period	90 days from delivery	15-30 days from order confirmation
When It Starts	📦 Upon delivery	⚠️ Upon order confirmation (even before you receive it)
Claims Handling	We do it directly — email us	Automated dispute system, seller dependent
After Window Expires	Still can contact us for support	No recourse, seller can ignore you

Destination	Freight (USD)	Est. Delivery Time
United States	$7.80	8–15 days
Canada	$6.80	18–30 days
Mexico	$10.00	30–60 days
Germany, France, United Kingdom, Greece	$6.50	18–30 days
Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Hungary, Ireland, Italy, Luxembourg, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, Switzerland	$8.00	18–30 days
Croatia, Finland, Lithuania, Latvia, Slovenia	$8.00	30–50 days
Bulgaria, Romania	$14.00	30–50 days
South Korea, Japan, Australia, New Zealand, Israel, Malaysia, Singapore, Thailand, Philippines, Kazakhstan	$7.50	18–30 days
United Arab Emirates, Saudi Arabia, Vietnam, Chile, Peru, Colombia, Brazil	$18.00	25–60 days

721855 500mAh 3.7V Li-Po Battery with JST Connector for UDI U818A, UDI U818A-1, Feilun H07N RC Drones

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721855 500mAh 3.7V Li-Po Battery with JST Connector for UDI U818A, UDI U818A-1, Feilun H07N RC Drones

✅ Why Our Warranty Stands Out

📦 Shipping Cost & Delivery Time (Economy Shipping from China)

Description

Discover more from Battery.qingsm.tech

Reviews

Frequently Asked Questions

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