GEPRC Storm IRT21700-40T 6S2P 8000mAh Li-Ion Battery

More Flight Time for Endurance Missions

With 8000mAh capacity, this Li-Ion pack is built to keep long-range quads in the air longer than typical smaller FPV batteries. It is especially useful for cruising, mapping routes, scenic flights, and smooth endurance runs where consistent energy matters more than repeated high-current freestyle punch-outs. 

User value: longer flight windows, fewer battery swaps, and more time to explore the line instead of watching the timer.

Premium Samsung 21700-40T Cells

This pack uses Samsung 21700-40T lithium cells, known in the FPV community for strong capacity, stable discharge behavior, and dependable endurance performance. The 15C discharge rating is tuned for long-range cruising and efficient power delivery rather than aggressive racing-style bursts. 

User value: reliable energy delivery, better endurance consistency, and a pack that fits the way long-range pilots actually fly.

Stable 6S2P 22.2V Output

The 6S2P configuration delivers a stable 22.2V platform with more usable capacity for larger FPV drones. Compared with smaller packs, this setup better supports efficient cruising on 7-9 inch long-range builds that need steady voltage over a longer flight profile. 

User value: smoother cruise power, more predictable voltage behavior, and better confidence on longer routes.

XT60 Plug and 12AWG Wire for Secure Power Transfer

The GEPRC Storm 8000mAh battery comes with a pre-installed XT60 connector and heavy-duty 12AWG silicone wire. This setup provides a secure, common FPV power connection for larger drones and helps maintain reliable current flow during long flights. 

User value: easier setup, stronger connection, and better compatibility with common long-range FPV power systems.

Balanced Size and Weight for Long-Range Builds

At 146 × 65 × 44mm and about 886.5g, this battery is designed for larger 7-9 inch FPV drones where endurance and payload balance matter. It offers high capacity while keeping a practical form factor for long-range frames. 

User value: a strong capacity upgrade without an awkward layout, making it easier to mount cleanly on long-range builds.

Specifications

● Battery Type: Lilon

• ● Battery: Samsung lithium battery 21700-40t

• ● Voltage: 22.2V

• ● Capacity: 8000mAh

• ● Discharge rate: 15C

• ● Cell combination: 6S 2P

• ● Size: 146*65*44mm

• ● Weight: 886.5g

• ● Silicone wire: 12AWG

• ● Connector: XT60

• ● Minimum discharge voltage: 18.0V

• ● Suitable for: 7-9 inch long-range FPV

Includes

● 1 x IRT21700-40T 6S2P 8000mAh Li-Ion Battery

Instructions

1. Please charge the battery before using it.
2. It is recommended to use 1C current for charging.
3. Keep away from flammable and explosive items when charging.
4. Do not continue to use the battery with a bulge or leakage, and discard it immediately.
5. Do not short-circuit the positive and negative poles of the battery.
6. Do not disassemble or modify the battery pack without authorization.

Warning

1. Please use a professional charger to charge the lithium polymer (LiPo) battery, and it is forbidden to use other types of battery chargers.
2. Do not charge it unattended.
3. It is forbidden to use a current exceeding 2C when charging.
4. Keep away from flammable and explosive items when charging the battery.
5. Please keep the charging environment well-ventilated and heat-dissipated when charging.
6. Overcharging is prohibited (the fully charged voltage of a single cell is not higher than 4.10V).
7. Over-discharge is prohibited (the voltage of a single cell after discharge is not lower than 3V).
8. Keep away from naked flames and fire sources.
9. Keep away from liquids and humid environments.
10. It is forbidden to disassemble or refit the battery pack without permission.
11. Do not short-circuit the positive and negative poles of the battery.
12. If there is a collision during use, please take out the battery and check whether the battery is damaged or leaking, and whether the power cord and the balance head are connected to the battery normally.
13. Please use the battery in an environment of 0-45 degrees Celsius.
14. For the battery that has just been used, please wait until the temperature of the battery is lower than 45 degrees Celsius before charging.
15. If it is not used for a long time, please discharge the battery to a single cell of 3.4-3.7V for storage, and perform charge and discharge activation every 2 months to maintain the stability of the battery.

Buyer’s Guide: GEPRC Storm IRT21700-40T 6S2P 8000mAh Li-Ion Battery

When venturing into deep mountain ranges or executing long-range cinematic flights on 7-inch to 10-inch FPV drones, standard LiPo packs simply cannot deliver the required endurance. The GEPRC Storm IRT21700-40T 6S2P 8000mAh Li-Ion Battery uses high-discharge Samsung 40T 21700 cylindrical cells in a dual-parallel architecture, delivering extreme energy density, minimal voltage sag under load, and rock-solid wind penetration for extended exploration missions.

Pilot Flight Impressions

"Putting this 6S2P 8000mAh Storm pack on my 7.5-inch long-range cruiser completely eliminated my mid-flight battery anxiety. Cruising smoothly at 55 km/h with a full DJI O3 setup, the current draw hovered right around 11A to 12A, keeping cell voltages remarkably steady well past the 20-minute mark. Because of the 2P parallel configuration sharing the load across 12 cells, full-throttle punches to clear ridgelines didn't trigger low-voltage alarms like traditional 1P Li-ion packs often do—pack voltage stayed reliably above 18.5V even under heavy throttle pops. By the time I touched down at 25 minutes of continuous flight with cell voltage sitting safely at 3.1V, the pack was only moderately warm to the touch. The extra mass (around 880g) locks the aircraft onto its trajectory like it's flying on rails, slicing straight through turbulent mountain crosswinds without getting knocked around."

Recommended Ecosystem & Hardware Pairings

● Long-Range & Heavy-Lift Motors: 2808 to 3115 Stator Motors (e.g., T-HOBBY Velox V2808, BrotherHobby Tornado T5 3115 Pro, MEPS NEON 3115).

● Flight Controller & ESC Stack: 55A–70A 4-in-1 ESC Stack with STM32F722 MCU (e.g., Flywoo GOKU F722 Pro V2 55A Stack, T-HOBBY V70A SE 8S Stack).

● Long-Range Frames: 7-inch to 10-inch Deadcat or Long-Range Carbon Frames (e.g., iFlight Chimera7, GEPRC Crocodile7 / Mark4 7"-10").

● Propellers: 7-inch to 10-inch Long-Range Carbon or Polycarbonate Propellers (e.g., HQProp 7x4x3, Gemfan 7040 / 8040 / 1050).

● Safety & Recovery Gear: Self-powered search buzzer and GPS rescue unit (e.g., VIFLY Finder 2 Buzzer).

● Charger: Dual-channel smart balance charger with dedicated Li-Ion mode (e.g., ToolkitRC M6D 500W DC Charger).

GEPRC Storm 8000mAh 2P vs. iFlight Fullsend 4000mAh 1P

Selection Summary

● Choose the GEPRC Storm 6S2P 8000mAh if: You are flying 7-inch to 10-inch long-range exploration drones where deep mountain reach, 25+ minutes of airtime, heavy wind resistance, and low voltage sag under throttle bursts are your highest operational priorities.

● Choose the iFlight Fullsend 6S 4000mAh if: You prefer a lightweight 7-inch setup that maintains responsive, snappy handling for mid-range cinematic lines, allowing you to shed ~440g of battery mass while still getting 12–16 minutes of flight time.

Recommended Parts

● HOTA S6 Ultra Dual Channel AC/DC Smart Charger

● SkyRC B6neo+ 240W Smart Charger

● MEPS Fireproof LiPo Battery Safety Bag

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