Tech Help, LRP Chargers

With cycling, you can set the parameters to charge and then discharge a pack. The benefits are, if the battery has been setting for a while and they run soft or short on time, you can simulate them being used to recondition the pack. The next plus would be you can see how your packs run, how much charge they take, what the average voltage of the pack is during the discharge. That info helps you to find out which are your best batteries by run time and voltage. The higher the run time the longer the pack will run, and the higher the voltage, the more power you will have coming off the corners.

4 How long does it take to charge the cells?

The 2000s take about 35 minutes, the 3000s take about 35 to 40 minutes. These times are approximate, for all batteries charge just a little differently and it depends on what amperage rate your charger uses.

5 I see most of the guys discharging their battery packs with 10 light bulbs.

Light bulb dischargers are OK to use on NiCad cells only--1700, 2000, 2400. Do not use them on NiMH. They can damage NiMH's by over-discharging. It is OK on NiCad to see the voltage drop to 2.6V when the light bulbs are on. When you remove them, it is normal for them to climb back up in voltage. 7.18 is not abnormal at all for what can be called "residual charge."

6 If you can't hook up a charger to a car battery charger, how can I power the charger?

You can purchase a power supply. This will allow you to clip the leads of your charger to it and give you the proper power to charge from. Any electronics store will carry a power supply for your application.

7 Someone talked about charging the batteries half way at 2.5 amps and the rest at 6 amps. Will this harm the memory in the batteries or the high voltage output?

Charging your batteries halfway at a low amp reading and then the other half at a higher amp reading will harm the battery’s memory.

8 Can I use the Pulsar to charge TX (transmitter) and RX (receiver) batteries?

Your Pulsar charger will charge your RX and TX batteries.

9 Can the LRP Quick and Easy Digital Charger charge 3000 NiMH?

Yes it can, but you should periodically, throughout the charge, feel the pack and make sure they are not getting hot, if they do get hot remove them.

10 What are the specs of your new LRP Quick & Easy Charger?

For 6 cell packs up to 7.2V in capacity range of 1200-4600 mAh. Charges at maximum current of 4.0A.
For 7 cell packs up to 8.4V in capacity range of 1200-4600 mAh. Charges at maximum current of 2.2A.
For 8 cell packs up to 9.6V in capacity range of 500-4600 mAh. Charges at maximum current of 0.8A.

11 I have currently bought a LRP Pulsar charger and am confused over the matter of a DC power supply to run it. I have been told that an automotive battery is sufficient to use, on the other hand I have been told to only use an AC/DC power supply converter.

You can run the charger off of a car battery. The only disadvantage is that it is not a clean source of power. In other words, there may be small voltage spikes that could cause the charger to false peak. A power supply has a filtered power supply so you get none of the voltage spikes, just a clean steady supply of power. The disadvantage of the power supply: it will cost you about $100.00 dollars on the average.

12 I don't know what settings I have to dial-in for a 4 AAA cells pack, to power a mini-z. I usually charge this type of cell at 1A, and discharge at 3A.

Your settings seem to be fine. Set the voltage peak at its lowest setting and a discharge cut off of 3.6 volts.

13 Could you please help me set up the Quasar Pro charger to discharge or should I even do that?

You should discharge your NiMH cells before you charge them up. Set the discharge at 20 amps.

14 How do I set up the Quasar Pro charger for my SMC GP3306p packs (6-cell)?

You will want to charge the batteries from 4-5 amps. Do not use trickle charge. Set the Delta peak at 3-5mv per cell or 18-30mv per pack. With those settings you should have no problems.

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