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Two rectangular drone batteries side by side, dark grey plastic with gold contacts and printed labels

KingSener

KingSener SMi3 2-pack flight battery 7.38V 3850mAh

SKU CH-N9A9-HFJ52

Two 7.38 V 3850 mAh intelligent flight batteries built for DJI Mini 3 and Mini 4 Pro drones

  • Battery Voltage7.38V
  • Battery Capacity3850mAh/28.41Wh
  • Extended flight time from 3850mAh 28.41Wh capacity
  • Intelligent protection prevents overcharge and short circuits
  • Designed for DJI Mini 3 and Mini 4 Pro
  • High-quality Li-ion cells deliver stable power output
  • Quick swap installation keeps drone mission-ready

Two-pack flight batteries for DJI Mini 3

This twin set supplies two KingSener SMi3 intelligent flight batteries built for the DJI Mini 3 and Mini 4 Pro drones. Each unit delivers a nominal 7.38 V and 3 850 mAh capacity, giving pilots spare power for longer sessions. The pack suits photographers and survey operators who need quick swaps between flights.

Li-ion chemistry and proprietary drone interface

The batteries use lithium-ion cells with an integrated protection circuit that guards against overcharging, overheating and short circuits. They connect through the drone’s dedicated battery bay, so no universal charging standard applies. Users must follow the maker’s cycle guidance — full charge and discharge at low current two or three times — and avoid leaving the pack on the adapter for extended periods.

28.41 Wh per unit with storage discipline

Each battery stores 28.41 Wh, enough for typical aerial photography runs on the supported Mini models. Capacity drops if the pack sits unused; the maker advises recharging above 80 % at least once a month during long storage. The cells are not designed for other DJI series such as Mavic or Phantom, and they must never be punctured, crushed or exposed to fire or water.

Highlights

  • Extended flight time from 3850mAh 28.41Wh capacity
  • Intelligent protection prevents overcharge and short circuits
  • Designed for DJI Mini 3 and Mini 4 Pro
  • High-quality Li-ion cells deliver stable power output
  • Quick swap installation keeps drone mission-ready

Specifications

BrandKingSener
ModelSMi3
Part NumberSMi3 SMi4 BWX140
Battery Voltage7.38V
Battery Capacity3850mAh/28.41Wh

Questions about this item

How many batteries come in the pack and what capacity does each one provide?

The pack contains two SMi3 intelligent flight batteries, each rated at 3850 mAh and 28.41 Wh for extended flight sessions.

What does the 28.41 Wh rating mean for actual flight time on a DJI Mini 3 or Mini 4 Pro?

At 28.41 Wh per cell, the pair delivers roughly double the energy of a single stock battery, giving noticeably longer aerial photography windows before recharge.

Which connector standard does the SMi3 use and what voltage does it supply to the drone?

The SMi3 uses the native DJI Mini 3 and Mini 4 Pro interface and supplies a nominal 7.38 V to the flight controller and motors.

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