ProTek RC LiPo Spektrum DX7S/DX8/DX9 Transmitter Battery (7.4V/3800mAh)

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ProTek RC LiPo Spektrum DX7S/DX8/DX9 Transmitter Battery (7.4V/3800mAh)
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This is a ProTek R/C 2S - 7.4 Volt, 3800mAh Li-Poly transmitter battery pack. This battery has been developed specifically for the Spektrum DX7S, DX8 and DX9 transmitters. This light weight Li-Poly transmitter battery will help to dramatically extend the run time that your transmitter can offer, which is great for long days at the field! The overall weight will only be affected slightly when compared to a typical NiMH transmitter pack as this battery weighs 143 grams, whereas your typical 4.8V NiMH AA battery pack weighs approximately 112 grams. This battery will not reduce the weight of your transmitter, but will provide you with an incredible 9 to 10 hours of run time!

NOTE: To ensure you do not over discharge this battery it is imperative that you change the battery type in the system settings from NiMH to LiPo. This will reset the low battery alarm voltage to the appropriate level for your new battery and allow your battery level indicator to read more accurately. You will find step by step instructions showing how to change this setting within your owners manual.

How should the battery be inserted into the transmitter?
A suitable foam should be used to pad the battery in the transmitter battery compartment to help hold the battery in place and prevent it from moving around. Place a piece similar in size to the battery into the transmitter battery housing under the battery, and then while pressing lightly on the battery, slide the cover over the battery.

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  • Voltage: 7.4V
  • Capacity: 3800mah
  • Chemistry: Lithium Polymer
  • Balance Charge Plug: XH
  • Charge Rate: 1C
  • Discharge Plug: JR/Futaba
  • Dimension (LxWxH): 56.5x72x18.8mm
  • Weight: 143g

1) DO NOT leave the battery in your model when charging
2) DO NOT leave unattended when charging
3) ALWAYS balance charge the battery
4) ALWAYS use a LiPo charging bag
5) YOU MUST use a Li-Poly specific charger to charge the pack (NiMH or NiCD only chargers WILL NOT WORK!)
6) YOU MUST not over discharge the Li-Poly battery pack
7) READ & UNDERSTAND the instructions carefully before operating this battery

NOTE: When using high energy Li-Polymer Batteries, please do not over-discharge or over-charge batteries as this will result in over heated batteries. Discharging capacity can't exceed 80% of the max capacity of the pack after full charging to ensure a good cycle performance. It is recommended to fully charge a brand new battery before using and only discharge the battery 50% for first 5 cycles. Always monitor race time and/or set a low voltage warning on ESC (End voltage cannot be lower than 3.2v per cell). Do not use the battery that has too low a voltage.

Do not expose batteries to sunshine or store/charge batteries at the temperature above 35°C or in a closed car. The high temperature environment could cause damage to the pack or make it burst. If the battery becomes hot while fast charging, high current discharging or racing, do not charge the battery until it has cooled completely. Wait about 20 mins, then inspect prior to recharging.

ProTek R/C is an AMain Sports & Hobbies brand.

This product was added to our catalog on May 10, 2012

Wednesday, Dec 21 2016 (about 6 years ago)
ProTek RC LiPo Spektrum DX7S/DX8/DX9 Transmitter Battery (7.4V/3800mAh)
I did not purchase this battery because the amain tech told me it was not designed for in transmitter charging. I don't think that would be a deal breaker for people who fly alot and have more than one pack, but it was for me. I'm also not sure how it will work out for "unintended long term storage". My nicads are tired, but are 4 or 5 years old.
stan takashima
Verified Owner
Wednesday, Dec 17 2014 (about 8 years ago)
ProTek RC LiPo Spektrum DX7S/DX8/DX9 Transmitter Battery (7.4V/3800mAh)
This LiPo pack also fits the 2014 DX6 (Black Version). Just remove the foam block from the battery compartment and install. It is a bit of a tight fit and somewhat costly for a LiPo pack but it is well worth the investment, especially if you are out in the field for a few hours or spend a lot of time on the simulator. There is also a foam block taped to the back of the battery cover, which you may have to remove (I left mine on there).