A Main Hobbies Announces ProTek R/C 4000mAh 5S 20C Power Packs

Chico, California, October 18, 2007 – A Main Hobbies today announced a ProTek R/C brand Lithium Polymer 5-cell 4000mAh 20C power pack. This lightweight Li-Poly 20C battery pack is designed to fit radio controlled planes and helicopters that require a 5S 4000mAh battery pack. These batteries are a true 20C battery pack and weigh only 485 grams! Using two of these batteries makes a perfect 10S battery setup for most 600 size electric helicopters, such as the T-Rex 600, Thunder Tiger Raptor E550 and E620SE and Miniature Aircraft XCell Razor 600E helicopters. Couple these with a powerful 600 size electric motor, such as those from NeuMotors, and you will have a screaming electric 3D machine!

Two of these batteries running in series for 10S battery setup will cost less than most leading brand 6S 5000mAh batteries, and provide significantly improved performance!

2C Maximum Charge Rate!
This battery pack is designed to be safely charged at 2C, twice the normal 1C charge rate required for most Li-Poly battery packs. With a 2C charge rate, you can get these battery packs fully charged in only slightly more than half the time it will take to complete a 1C charge.

CRASH Protection Guarantee!
This battery pack is covered by the ProTek R/C manufacturer "Crash Protection Guarantee"! If you crash your helicopter or airplane badly enough to damage the battery pack, you can send the damaged battery pack back to ProTek R/C and purchase a replacement battery for 50% off the regular sale price!

You can find this product listed here:



  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: 4000 mAh
  • Voltage: 18.5 volts nominal
  • Connector Type: None (16 GA wire)
  • Balancer Type: Align/E-Flite compatible
  • Weight: 485 grams
  • Configuration: 5S1P
  • Dimensions (WxLxH): 40 x 134 x 38mm
  • Maximum Charge Rate: 2C (8A)!
  • Maximum Continuous Discharge : 20C (80A)
  • Maximum Burst Discharge : 30C (120A)

Dealer Enquiries
Please direct dealer enquiries through HRP Distributing. You can find HRP Distributing on the internet at the following location: http://www.hrpdealer.com/

About A Main Hobbies
A Main Hobbies is a leading Internet retailer of radio controlled cars, trucks, helicopters and airplanes. Founded in early 2004, A Main Hobbies has rapidly become one of the largest Internet retailers in the country. A Main Hobbies prides itself on having the products customers’ need, when they need it, and providing first class customer service and product support. A Main Hobbies is a division of Good Time Hobbies, Inc., a privately held California Corporation. The company's Web address is http://www.amain.com.