ProTek RC 4S 120C Low IR Si-Graphene + HV LiPo Battery (15.2V/6500mAh) w/5mm Connector (ROAR Approved)

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ProTek RC 4S 120C Low IR Si-Graphene + HV LiPo Battery (15.2V/6500mAh)
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The ProTek R/C 4S 120C Graphene + HV 6500mAh LiPo Battery is a great battery option for anyone looking for a high capacity, high output 4S battery. Weighing 578 grams, the 4S HV is lighter than a standard 4S pack, with much higher capacity. This provides more runtime, and a dramatic increase in voltage and punch over the course of a run. 

This battery is designed to have improved power to weight ratios while maintaining a low CG. The improved efficiency of this pack will allow for lower operating temperatures and lower internal resistance. This gives users a more consistent battery pack. ProTek Graphene + 120C Packs deliver the power needed by serious racers and enthusiasts alike.

Lab testing has shown that ProTek R/C Silicon Graphene packs have double the cycle life when charged at 1C rates, and can be charged at higher amp rates, with less risk of damage to the pack. More importantly, the discharge curve is flatter, meaning the cells maintain higher voltage throughout the discharge cycle with no significant drop off. Additionally, when compared to conventional LiPo batteries Silicon Graphene batteries are lighter, providing a higher capacity per gram ratio. With 7.6V nominal voltage, 120C discharge ratings, incredibly high charge rates and ten different models to choose from, ProTek R/C 120C Graphene + packs are perfect for racers and bashers that demand the absolute best.


NOTE:
This battery is not recommended for high current draw 8S applications. 

Features:

  • Lighter than a hardcase 4S LiPo pack of equal capacity
  • Improved power to weight ratio and a lower overall CG
  • More runtime, with a dramatic increase in voltage and punch
  • Silicone Graphene can handle more abuse and deliver more current than a standard LiPo battery
  • Improved efficiency, lower operating temperatures, and lower internal resistance!
  • Increased run time, increased cycle life and increased voltage!
  • More capacity gram for gram when compared to standard LiPo cells
  • Perfect for stock class racers looking to shave grams
  • 10C max charge rates - 1C charge rate recommended for longest life
  • 15.2V nominal voltage
  • 5mm bullets and 5mm to 4mm bullet adapters included
  • Replacement XH4S balance adapter also available separately (PTK-5331)
NOTE: While these batteries are LiHV cells, they can still be charged the same as a standard LiPo with a standard LiPo charger. The overall voltage and capacity will be slightly less than when charged to LiHV specs, but the performance will be better than a standard LiPo thanks to the flat discharge curve, reduced weight and low internal resistance. When charged to 8.4V, these packs will still offer a noticeable advantage when compared to a standard 7.4V LiPo pack.

Battery Model 4S HV LiPo
ROAR Approved Yes
Type Silicon Graphene 
Voltage 15.2V nominal
Capacity @7.4V
6150mAh
Capacity @7.6V
6500mAh
Weight
578 g
Connector Type
5mm Bullet
Balance Connector
5 pin XH
Number of Cells 4 Cell
Configuration 4S2P
Dimensions (WxLxH) 47x138x38.2mm
Maximum Charge Rate 10C (65A)
Burst Current
120C
Watt Hour @7.6V
98.8 Wh

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Includes: 

  • (1) ProTek R/C LiPo Battery
  • (2) 5mm Bullet Connectors
  • (2) 5mm to 4mm Reducer Bullet Connectors
  • (1) 4S Balance Lead

LITHIUM POLYMER SAFETY INFORMATION

IMPORTANT:
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.

This product was added to our catalog on January 24, 2022

Monday, Jun 20 2022 (8 weeks ago)
ProTek RC 4S 120C Low IR Si-Graphene + HV LiPo Battery (15.2V/6500mAh)
I’m really disappointed. This is the most expensive battery I’ve ever bought, it’s the newest battery I have, and it’s the first battery I’ve had from ProTek to fail. I don’t even have many runs on this pack! When I first got it, I felt it’s mah rating was wrong. I have the 5600 as well and it lasts a bit longer. Maybe the extra weight and mass of this 6500 makes the car work harder? Not a scientist though. All I can say this 6500, cell 1 has died. Battery is useless to run because that cell drops to dangerous levels right away. Hoping I just got unlucky on this battery. I use a ProTek Prodigy 625 charger. I raced at OCRC for years and only bought my ProTek batteries from them only, except for this 6500, which I bought here from AMain Coincidence? I doubt it, but it sucks.

Edit:
TL;DR: Just go with another brand like Gens Ace and also, don’t buy your batteries online unless you have to. And if you have to, buy them from a different website than this one. Don’t overpay to be left stranded with a tiny warranty window on an overpriced battery that was pour quality. Thanks.
Verified Owner
Thursday, Jul 7 2022 (6 weeks ago)
ProTek RC 4S 120C Low IR Si-Graphene + HV LiPo Battery (15.2V/6500mAh)
Just dropped a cell out of no where had it for 4 months always leave my batteries storage charge around 14.8 went to charge and the number 1 cell wouldn’t read
Monday, May 23 2022 (3 months ago)
ProTek RC 4S 120C Low IR Si-Graphene + HV LiPo Battery (15.2V/6500mAh)
I purchased two of these batteries and ended up having a small issue with one, i was concerned about the warranty as i live in Canada ?? I contacted customer service through the chat and was quickly answered by Brett N, he was great to deal with and got me fixed up in minutes! My hats off to you guys I will definitely be shopping at amainhobbies again.