User Manual

7) How important is Balancing?
Balancing is an important precaution when using Lithium batteries. A123 Racing batteries are not as prone to
divergence as other batteries, but we still recommend balancing the cells to keep your pack in good health and
ensure maximum cycles. If you are using a charger that does not balance, you should look into a separate
balancer, or hand-charge each cell individually.
8) Are these batteries ROAR approved?
Our batteries, as with all other lithium batteries, are currently not approved for ROAR racing.
9) What is Lithium Ion Nano Phosphate?
Lithium Ion Nano Phosphate is the technology that allows us to create our unique battery. It is because of this
technology that we have lower internal resistance, higher discharge rates, faster charging rates, and improved
safety.
10) What kind of power are we talking about?
Our cells are capable of 30C continuous discharge and 60C pulse discharge. What is C? C is a rating that
battery manufacturers use to show how much power can deliver based on their capacity rating. For example,
our 6.6V 2300mAh pack can discharge at 30C so we take 30C x (2300mAh/1000) = 69 amps. This is the
amperage that the pack can deliver continuously. In comparison a 7.4V 2300mAh Li-Po pack is rated for 20C,
20C x (2300/1000) = 46 amps.
11) How much voltage sag will I see?
Voltage sag is how much your voltage drops during the course of a discharge. When using Nickel Metal
batteries this is frustrating because your battery vehicle only operates at full power for a portion of the run.
A123 Racing batteries show very few signs of voltage sag. Refer to our discharge graphs, as the plotted line is
very flat. What does this mean? This means that your car is going to run at or near full performance for the
duration of the battery.
12) If there is no voltage sag, how will I know when the pack is getting empty?
Having very little voltage sag is a great benefit when you are using your vehicle, but it means that your battery
will run out quickly once it starts to get low. In surface vehicles you will see the car start to slow down and
soon after that it will be almost entirely drained. This scenario needs to be avoided when being used in an
electric flight vehicle. As with any new electronics, you should always test your equipment before using it.
For electric flight, we strongly recommend bench testing the battery, or making short flights to determine how
long you can fly on your pack.
13) Charge times?
Our batteries boast the fastest charge time for any RC battery by 2X -4X. Our batteries can be charged to full
capacity in 15 minutes. Charging at these high rates has little to no effect on the cycle life of the pack.