ProTek RC Li-Poly 3C Stick Receiver Battery Pack (7.4V/2100mAh) (No Balance)

ProTek RC Li-Poly 3C Stick Receiver Battery Pack (7.4V/2100mAh) (No Balance)
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This is a Li-Poly 2100mAh receiver battery pack from ProTek R/C. This super light weight Li-Poly battery is designed to power the electronics of 1/10th & 1/8th scale gas powered race cars. Overall weight of your race car will be significantly reduced over the use of typical NiMh receiver packs. The battery voltage to your receiver and servos will remain constant throughout the race with the use of a voltage regulator (required). A constant voltage for your servos will ensure consistent performance at the start and end of your race compared to typical NiMH receiver battery packs.

Perfect battery for the Airtronics M11X radio!

This battery is also the perfect transmitter battery for the Airtronics M11X transmitter, which requires a 2S Li-Poly battery for operation.

Don’t be thrown off by the capacity rating of Li-Poly battery packs, as you will get awesome runtime out this pack! Unlike NiMH battery packs, Li-Poly battery packs do not lose voltage as quickly over time and can handle higher current draw than typical NiMH battery packs. Given that Li-Poly battery packs provide a higher nominal voltage (7.4V nominal), the actual capacity of the battery pack when compared to a typical NiMH battery pack (6.0V nominal) is about 30% more than the rated value (so this pack would be about the same as a 2700mAh NiMH pack in total capacity). Also with the use of a voltage regulator, Li-Poly battery packs will produce the same voltage to your receiver and servos at the end of the pack as it does at the start. This means the useable capacity of the battery pack is significantly more than typical NiMH battery packs, because most NiMH battery packs will produce significantly less than the 6.0V nominal voltage once they get below half capacity (ie: your servos will be a lot more sluggish if your typical NiMH battery pack is below half capacity).

Why must Li-Poly receiver packs be used with a voltage regulator?
Although the Li-Poly battery pack’s nominal voltage is 7.4V, when it is fully charged the voltage output is 8.4V. The 8.4V output exceeds the safety level of most receivers and servos on the market, so you must use a voltage regulator with these Li-Poly receiver packs to decrease the voltage to safe levels that your receiver and servos can accept.

1) You will need a Li-Poly specific charger to charge the pack (NiMH or NiCD only chargers WILL NOT WORK!)
2) You must not over discharge the Li-Poly battery pack.
3) Read the instructions carefully before operating this battery.


  • Capacity: 2100 mAh
  • Weight: 87 grams (including wire and connector)
  • Li-Po cell arrangement: 2S1P
  • Nominal voltage: 7.4 Volts
  • Discharge capability: 3C continuous (6.3A), 6C max (12.6A)
  • Dimension(mm): 85 x 30 x 16mm
  • Connector: JR Style with 24AWG PVC Wire
  • Recommended Application: 1/10th & 1/8th scale vehicles that normally use a flat stick pack receiver battery

ProTek R/C is an A Main Hobbies brand.

This product was added to our catalog on July 9, 2009

Verified Owner
Monday, Mar 1 2010 (about 10 years ago)
ProTek RC Li-Poly 3C Stick Receiver Battery Pack (7.4V/2100mAh) (No Balance)
My understanding is that Lipo may go out of balcance if you keep drawing power at the last 30% of its capacity.
I am running two 7.4v servos and 7.4v receiver, use about half of its capacity every meeting, after more than 10 charging cycles and my lipo has not gone out of balance yet.
I will just buy "no balance" this time around.
Thursday, Dec 10 2009 (about 10 years ago)
ProTek RC Li-Poly 3C Stick Receiver Battery Pack (7.4V/2100mAh) (No Balance)
Anybody who bought this please leave a review. What is the deal with no balancing port? Does anybody know how this will affect charging it because it is only a 2 cell?