For Airtronics MT-4, MT-4S, MT-R, M12, M12S, M11X, and KoProPo EX-RR, MT-S transmitters
Overview:
Lightweight, long-lasting, and precision-built — the ProTek RC 7.4V 2800mAh LiPo Transmitter Battery is designed to power your Airtronics or KoProPo radio systems for marathon sessions without the bulk of standard NiMH packs.
About the Transmitter Battery
High-Performance LiPo Power for Pro-Level Radios
Specifically engineered for top transmitters such as the Airtronics MT-4, M12, M11X, and KoProPo EX-RR, this 2S LiPo pack delivers up to 9–10 hours of runtime with rock-solid voltage stability. Weighing only 105g, it cuts transmitter weight by nearly 40% compared to a six-cell NiMH pack — perfect for long main events or full days at the track.
Reliable Construction & Easy Fit
Built with premium lithium-polymer cells, this pack includes an XH balance lead and JR/Futaba-style discharge connector for compatibility with most chargers. Use soft foam padding inside your transmitter battery compartment for a snug, secure fit that keeps the pack in place during operation.
Features:
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Specifically designed for Airtronics and KoProPo transmitters
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Lightweight LiPo chemistry — only 105g
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Up to 10 hours of continuous use per charge
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Reduces fatigue during long race days
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JR/Futaba connector and XH balance plug for universal compatibility
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Durable cell construction ensures consistent voltage and long cycle life
Safety Notes:
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Always balance charge using a LiPo-specific charger
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Never over-charge, over-discharge, or leave batteries unattended
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Charge inside a LiPo safety bag
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Avoid exposure to direct sunlight or high-temperature environments
Specifications:
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Specification
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Details
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Voltage
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7.4V (2S LiPo)
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Capacity
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2800mAh
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Chemistry
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Lithium-Polymer (LiPo)
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Charge Rate
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1C
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Discharge Plug
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JR/Futaba
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Balance Plug
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XH
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Dimensions
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99.2 × 31 × 17.9mm
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Weight
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105g
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Includes:
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(1) ProTek RC 7.4V 2800mAh LiPo Transmitter Battery Pack
