ProTek RC PTK-5187 LiFe Futaba, JR, Spektrum, KO, Transmitter Battery 9.9V 2100mAh

This is the ProTek R/C LiFe Transmitter Battery Pack and is intended  for use with Futaba, JR, Spektrum and KO Propo Transmitters that use a  4x4 AA Battery Tray. Lithium battery technology is evolving. With cell  dimensions that fit anywhere a standard Li-Poly battery will and rapidly  increasing capacity, LiFe chemistry will soon set the standard that all  others are judged by. With the ability to deliver 1000+ usable cycles,  and a life span up to 4 times longer than Li-Poly batteries (when cycled  under the same discharge conditions), these batteries offer the user an  excellent balance of performance and value. LiFe batteries are more  durable than Li-Poly and are able to handle a higher level of abuse when  compared to Li-Poly without the risk of pre-mature failure. Unlike  Li-Poly, LiFe cells can be stored in a fully charged state with little  to no loss in stored power, and can be discharged deeper with less risk  of damage to the cells. Most importantly, LiFe batteries are SAFE! There  is no risk of combustion! LiFe cells will not catch fire or explode  when over charged, or after a deep discharge.   
 

What about the voltage?
A 2 Cell LiFe battery produces 6.6 volts nominal, which is almost  a full volt less than a 2 Cell Li-Poly battery. The LiFe battery is not  meant to replace the performance of a Li-Poly battery, it is simply  another option. LiFe offers the user a battery with a good discharge  curve that is better than that of a NiMH battery, but without the risk  of damage or fire that exists when a Li-Poly battery is abused.   
 

NOTE: Brand new LiFePO4 batteries have been  found to fail prematurely if they are deep discharged below 33% capacity  too early. A break-in period of 20 cycles is currently recommended.  While testing has shown that this battery can be charged at up to 3C  rates, it is recommended that this battery not be charged at rates  higher than 1C to maximize the lifespan of the battery. Additionally,  LiFe batteries should not be discharged below 2.5V per cell to avoid  pre-mature failure and maximize battery life span.   
 

We also recommend you REMOVE the batteries from  your cars or radios when you are done, or at least unplug them to avoid  accidental over discharge if the unit is left on.   
 

IMPORTANT:
1) You will need a LiFe specific charger to charge the pack (NiMH, NiCD or Li-Poly only chargers WILL NOT WORK!)   
2) You must not discharge the LiFe battery pack  below 33% capacity during the break in period or below 2.5V per cell  after break in.   
3) It is not recommended that you charge this LiFe battery pack at amp rates higher than 1C.   
4) Read the instructions carefully before operating this battery. 

Features: 

• Safe chemistry will not explode or catch fire
• More mAh per gram compared to NiMH cells, meaning lighter models, and longer runtime
• Virtually no "self discharge", so the battery is always ready to go even weeks after charging.
• Superior voltage performance under load compared to NiMH cells, with consistent torque and speed.
• Fast charge time

Specifications:
 

• Voltage: 9.9V
• Capacity: 2100mah
• Chemistry: LiFePO4
• Balance Charge Plug: XH
• Charge Rate: 1C   
  
• Discharge Plug: JR/Sanwa/Ko
• Dimensions (LxWxH): 95x29x29mm
• Weight: 150g