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802042 550mAh 3.7V 25C Li-Polymer rechargeable battery with XH2.54 plug, front view showing battery label and connector
802042 550mAh 3.7V Li-Polymer battery size measurement, dimensions 45.5mm length, 20mm width, 7.5mm thickness for UDIRC U27 U941A RC drone compatibility

802042 550mAh 3.7V 25C Li-Polymer Battery with XH2.54 Plug for UDIRC U27 U941A RC Drone

Original price was: $12.99.Current price is: $9.99.

🔘 802042 550mAh 3.7V 25C | 🔋 Li-Polymer with XH2.54 Plug | 📱 Compatible with UDIRC U27 / U941A RC Drone

8 in stock

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SKU: 802042 Category: Tags: , ,
📦 Shipping, Warranty & After-Sales Information (Click to expand ▼)

✅ Why Our Warranty Stands Out

Unlike marketplace sellers with short buyer protection windows, we handle claims directly — no automated disputes, no endless back-and-forth.

Compare✅ Qingsm Tech⚠️ eBay / AliExpress
Warranty Period90 days from delivery15-30 days from order confirmation
When It Starts📦 Upon delivery⚠️ Upon order confirmation (even before you receive it)
Claims HandlingWe do it directly — email usAutomated dispute system, seller dependent
After Window ExpiresStill can contact us for supportNo recourse, seller can ignore you

🔋 90-day warranty is the industry standard for replacement batteries. Batteries naturally lose capacity over time — this normal wear is not covered. Warranty applies to manufacturing defects only.

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

📦 Note: Batteries are classified as hazardous goods and must be shipped via specialized channels, which may take slightly longer than standard couriers. Delivery times are estimates and may be affected by customs, weather, or other unforeseen circumstances. If your country is not listed in the table below, we are currently unable to ship batteries to that destination.

DestinationFreight (USD)Est. Delivery Time
United States$7.808–15 days
Canada$6.8018–30 days
Mexico$10.0030–60 days
Germany, France, United Kingdom, Greece$6.5018–30 days
Ireland, Austria, Belgium, Poland, Denmark, Switzerland, Portugal, Norway, Slovakia, Spain, Hungary, Italy, Czech Republic, Luxembourg, Netherlands, Sweden, Cyprus$8.0018–30 days
Croatia, Finland, Lithuania, Latvia, Slovenia$8.0030–50 days
Romania$14.0030–50 days
South Korea, Japan, Australia, New Zealand, Israel, Malaysia, Singapore, Thailand, Philippines, Kazakhstan$7.5018–30 days
United Arab Emirates, Saudi Arabia, Vietnam, Chile, Peru, Colombia, Brazil$18.0025–60 days

🇧🇷 Note for Brazil: Brazilian customs can occasionally cause delays of up to 80 days or more. And please indicate the recipient's CPF, as it is required for Brazilian customs and shipping. Thanks! We appreciate your understanding.

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Description

✅ Condition: Brand New – Factory‑tested Grade A cells

✅ 25C High Discharge Rate – Reliable power for acrobatic flight

✅ CE / RoHS Certified – Built with safety protections

✅ 90‑Day Warranty from delivery – Longer coverage than major platforms

✅ XH2.54 Plug & Play – No soldering required

✅ Ships in 3‑7 days with tracking

🛡️ Shipping Protection Available at Checkout

✅ PayPal Buyer Protection included

⚠️ Low Stock Alert: Only 8 left in stock. Order now to avoid waiting.

Package content: 1 x battery
Battery model: 802042
Capacity: 550mAh (Typical)
Rated voltage: 3.7V
Charge limit voltage: 4.2V
Max continuous discharge current: 13.75A (25C rate)
Battery type: Li-Polymer
Dimensions: 45.5 x 20 x 7.5mm
Weight: 13g
Connector: XH2.54 2-pin plug (red wire positive “+”, black wire negative “-“)
Compatible with: UDIRC U27, UDIRC U941A
Extend your flight sessions with this 802042 550mAh 25C Li-Polymer battery. Designed for UDIRC U27 and U941A micro drones, the 25C high discharge rate provides burst power for acrobatic maneuvers while maintaining stable voltage during flight. Each battery delivers up to 6-8 minutes of flight time per charge (depending on drone weight and flying conditions). For reference, third‑party retailers sell similar batteries for approximately $9 to $15 per piece.
Built with Grade A Li-Polymer cells and equipped with overcharge, over‑discharge, short circuit, and overcurrent protection. CE and RoHS certified for safe use. The XH2.54 connector ensures a secure plug‑and‑play fit with the original drone socket — no soldering or modification required.
Important Safety Note (LiPo Battery): Only charge with a dedicated LiPo balance charger set to 1S (3.7V) at 0.5C (approx. 275mA) — using incorrect chargers may cause fire. Do not leave charging unattended. The battery has no water resistance rating — avoid flying in rain or over water to prevent short circuits.
Battery Care Tips: Land your drone before voltage drops below 3.2V to avoid over‑discharge damage. Store at 40%‑60% charge (approx. 3.7‑3.8V per cell) in a fireproof LiPo bag when not in use. Keep away from direct sunlight and high temperatures. If swelling or physical damage is observed, stop use immediately and dispose of properly at a battery recycling center. For long‑term storage, recharge to storage voltage every 3 months.

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Frequently Asked Questions

The 802042 battery is compatible with UDIRC U27 and UDIRC U941A drones. It is designed specifically for these models, featuring an XH2.54 connector that matches the original drone socket. The U27 features 360° flips and comes with a 450mAh battery (about 4-6 minutes flight time) — the 802042 550mAh upgrade extends flight duration to 6-8 minutes per charge. Please check your drone's battery compartment dimensions (45.5×20×7.5mm) and connector type before ordering.

The 802042 550mAh 3.7V Li‑Po battery has a 25C maximum discharge rate (13.75A peak current) and a 1C standard charge rate (550mA max). For optimal safety and lifespan, charge at 0.5C (approx. 275mA) using a dedicated 1S Li‑Po balance charger set to 4.2V. Charging limit voltage is 4.2V, discharge cut‑off is 3.0V (land immediately when voltage drops near this level). Operating temperature range: charge 0‑45°C, discharge -20 to 60°C. The battery has a cycle life of 300‑500 full charge cycles when properly maintained.

No tools or soldering are required — the 802042 battery features an XH2.54 plug that directly matches the original drone socket. Simply disconnect the old battery and plug in the new one, ensuring the red wire aligns with the "+" terminal. For best performance: Always use a dedicated Li‑Po balance charger. Never leave a charging battery unattended. Land your drone before voltage drops below 3.2V to prevent over‑discharge. If swelling or physical damage is noticed, stop use immediately and dispose of properly. For long‑term storage, keep the battery at 40%‑60% charge (around 3.7‑3.8V) in a cool, dry place and recharge to storage level every 3 months.

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