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FREQUENTLY ASKED QUESTIONS

  • Standard Lipo Instructions
  • High Voltage Lipo Instructions
  • How do I store my lipo batteries
    A Proper storage voltage of 3.8v per cell is advisable. Example a 2s lipo will read 7.6v when at the proper storage voltage 3.8v x 2 =7.6v This is basically half charged. Do not leave your batteries in the trunk of a vehicle or in direct sunlight or a hot garage during the summer months this will severely damage your batteries!!! Do not forget to unplug your batteries from the vehicle or charger when not in use. Store in a cool moderate climate when not in use avoid freezing conditions.
  • What kind of charger do i need to charge my lipo pack?
    A good Lipo Charger is all thats required to charge a lipo battery. Most Important thing to keep in mind is that most chargers charge different types of batteries (Example)= Nickle Metal (NiMH)---Nickle Metal (NI-CD) Lithium High voltage (LIHV) and a few More. Make sure you on the proper setting before charging. Their are a few chargers that will not charge lipo battery so be sure it states somewhere on the charger that it will charge lipo. A Good Indicator That a chager is not safe to use is the absence of a balance port/Lead If you cant find this port/lead do not use it to charge lipos.
  • How fast can I charge my lipo
    The amount of time required to charge a battery depends of the Mah capacity and how full the battery is at the time of charging, and the capability of the charger/Charge Rate.
  • What does charge C rating mean? located on the back of Promatch batteries
    A Charge C Rating refers to the maximum charge rate that a battery can handle. Extreme caution must be used when determining charge rate. (Example)=2C Charge for a 5000 Mah battery means you can charge at a rate of 10.0amps. (5000)x2=10.00. Although this battery pack says its capable of 2c charging is is advised to treat your battery as a 1C (Example)= 5000mah at 1C charge rate equals a 5.0 amp charge rate (5000)x1=5.0 amp charge rate. Higher charge rates are only recommended for experienced users that are proficient with their charger.
  • How long will it take to charge my battery?
    Divide Battery Capacity x Charge Rate Current to calculate a rough charge time. Example 5000Mah divided by Charge rate current in Miliamps 3.0amps looks like this 3000 Miliamps. So 5000 divided by 3000 =1.6Hrs http://www.csgnetwork.com/batterychgcalc.html
  • When will I receive my items?
    This depends On the size of the package and shipping service, but usually within 3-5 business days.
  • When will my Item ship?
    Most items Ship same day, unless they are placed on a day that our warehouse is closed. We are closed Sunday, Monday, and Tuesday.
  • Which Shipping services do we use?
    Usps, FedEx, UPS, Dhl.
  • How Much Is Shipping?
    most Items Are shipped at a flat Rate of $8.00 Orders over $100 are Free
  • What Does the (S) Means On a lipo Battery label
    (Example)= 2S, 3S, 4S Lipo Label Reads as Follows- 2s 5000 mah 50C The “S” stands for the number of cells in the pack. A 2S pack is a 2 cell pack and is rated at 7.4 volts. A 3S pack is 11.1 volts, 4S 14.8 volts and so on.
  • Why Does my lipo pack charge to 8.4v Instead of 7.4v
    The “rated voltage is a number used by the battery industry to rate the median (50% charged) voltage of a battery cell. When fully charged each cell in a Lipo pack will reach 4.2 volts which equals 8.4v The lowest voltage you should ever discharge your lipo packs to is 3.0 volts per cell (6.0 volts for a 2S pack). We highly recommend a minimum voltage cutoff of 3.4 volts per cell.
  • Do I plug the Balance lead in when running my vehicle?
    NO the only time a balance plug should be used is during charging
  • Which Battery Is Right For Me
    First and foremost the battery choice is dependent on the size and type of vehicle you are using. Please refer to the vehicle electronic package to determine a minimum and maximum number of cells The ESC will determine this Number. (Example)= Traxxas Vxl3 will state 2s to 3s somewhere on the ESC (Speed Controller) or packaging or in the manufacturer's instructions. That Means do not Exceed a 3s battery!!!! This Also means the vehicle may not work at all with anything less then a 2s. As stated above this is just an example please refer to your vehicles or ESCś intructions!!!!!!!!!!!! If you race competitively you will certainly want a higher “70C+” rated battery. If you are a casual racer or just backyard bashing you will be fine with a 50C or less rated battery. We do not recommend using lower than a “30C” rated battery pack as voltage drops may cause radio glitches. If you are using 4S packs in a 1/8th scale buggy or Truggy we recommend using at least 70C rated packs or higher as these types of vehicles draw very high amounts of current.
  • What Is the Extra Little white plug With a Bunch of small wires for
    This is the “balance plug” and is inserted into the balance port of the battery charger. It allows the charger to adjust the current so that each cell in the pack reaches the same (4.2) voltage at the completion of the charge cycle. Make sure the balance ports match the balance plug on the battery pack as their are a few different types of balance plugs. The most common is an XH plug and is found on most brands of Lipo chargers. Adapters for different types of balance plugs are available and many chargers come with different balance adapters.
  • What Is the (C) Rating
    The “C” rating is a number that battery manufacturers use to rate the maximum amp draw a pack will withstand. It has been reported to me that the parameters for establishing this rate are as follows. The manufacturer measures the highest amp rate at which a battery will yield 80% of the stated capacity of the pack. So let’s say for a 5000 mah 50C pack, it would yield at least 4000 mah of capacity when discharged at 250 amps from a fully charged state to a cutoff of 3.0 volts. It says nothing of what damage was caused to the pack after this test, or that the test was done by direct connection to the cells and not through the power wires and plug. So take from this what you want. The only conclusion that can be legitimately be drawn from the “C” rating is that the higher the “C” rating within a particular brand the better the performance will be. The “C” rating of a pack is probably the most ambiguous measurement of performance that I have ever seen. Hopefully, in the future, a “real world” measure of performance can be established. “VDUL” (Voltage Drop Under Load) and “IR” Internal Resistance are the two biggest factors relating to performance. Since the resistance of the cells is so dramatically affected by increased temps, this measurement is also subject to manipulation. Some companies really inflate this rating so it is important to understand that the “C”rating is quite subjective. Also remember that buying a lower “C” rated battery and running it in a high current draw application such as 1/8th scale cars will overstress the battery and cause the pack to “swell”.
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