Q:I have a small rc helicopter, loads of fun btw, and I was curious if I could add another, identical battery to the existing one,and fyi the heli could handle the extra weight, no problem.

in case you boost the amps draw (modern-day) the amp hours will shrink by way of warmth waste, and the character of batteries, additionally i think of that score is like under optimal situations, like low draw for long term. in case you upload extra cells in sequence to extend the volts the motor rpms will boost and so will the stall modern-day which may make a lot of heat and torque. Dc autos are rated amps at finished sustainable load at rated speed. The torque is without delay proportional to amps obtainable and speed is without delay proportional to volts obtainable you could double the skill %. in parallel and get extra torque and battery existence. You did no longer state your application so i won't be able to furnish extra suggestion. with the help of ways it is alright to overload dc autos severly for brief sessions of time without severe effects, yet like an engine, it does shorten the existence.

Q:i have one of those light up head bands, mine has horns; and the battery pack sticks out on my head, how can i hide it, or how should i do my hair.

Get bangs and pin them up over the battery pack.

Q:But works when the regular batteries are used, or works when using the other rechargeable batter pack. Why?

Microsoft reconfigured the wireless controller power requirements at one point, around August 2007. Older packs don't work with controllers made after this point. I know Nyko has a replacement program, don't know if Microsoft does. If that is not the case, it is just a busted pack. Try to get a replacement through warranty or just buy a new one.

Q:I took apart a dead Roomba Battery pack to see if I could replace a few cells and found that one of the battery's polarity had switched from negative to positive. I've never seen this. Luckily it was at a very low charge. Do you know how to reverse polarity on a NiMH battery so I can reuse it? Or am I out of luck?

you can't. it's junk

Q:DUE TONIGHT PLEASE HELPA 90 kg astronaut floating out in space is carrying a 1.0 kg TV camera and a 10 kg battery pack. He's drifting toward his ship but, in order to get back faster, he hurls the camera out into space (away from the space ship) at 18 m/s and then throws the battery at 11 m/s in the same direction. What's the resulting increase in his speed after each throw?speed increase after discarding camera.?speed increase after discarding battery?

The key here is to remember that momentum is conserved. Momentum is mass times velocity. Are you sure you've got the masses right, surely the TV camera is heavier than the battery pack? Since (relative to each other), neither astronaut, nor camera nor battery is moving, the total momentum can be taken to be zero. So after throwing the camera away, the total momentum should be zero m/s. That means the astronaut should have equal momentum in magnitude, but opposite in direction, to the camera. Let's take the direction the camera was thrown in to be negative. Then the momentum of the camera after it is released is (1.0 kg)(-18 m/s) -18 kg m/s. So the momentum after discarding the camera must be 18 kg m/s. Dividing by the mass of the astronaut (plus battery pack, as he's still got it at this point), which is 100 kg, gives an increase in speed of 0.18 m/s. Now we do the same thing with the battery pack. Since, relative to each other, neither are moving, we can say that the total momentum before releasing it is zero, so the total momentum after releasing it must be zero also. The momentum of the battery pack, since it is thrown in the negative direction also, is (10 kg)(-11 m/s) -110 kg m/s. Therefore the total momentum of the astronaut must increase by 110 kg m/s also, and dividing by the mass of the astronaut (90 kg) gives a speed increase of 1.22 m/s.

Q:Here are links to pictures of my Worx Battery (18V 1.7Ah) and its accompanying charger unit. The battery is for the Worx 10-inch 18V Cordless Grass Trimmer

You could do what a lot of radio control guys do and build yourself a simple bulb dis-charger. I don't know where you can find bulbs that can handle 18 volts. I would think most automotive bulbs would burn out @ 18 volts, but it doesn't hurt to try. You need to remember that the bulbs will get hot. I have seen way better examples of a bulb dis-charger, but this will get you started.

Q:I bought a Canon VIXIA HF R300 Camcorder a few months ago, and I noticed a message saying to change the battery pack almost as soon as I turned it on. I just decided to wait and see what that meant, since I didn't know why it would need it; I had literally just gotten the camera. Now when I turn on the video camera it says that message every time, and when I go to look at the videos I've recorded it pops up there too. When I'm recording the battery drains REALLY fast. Why is it doing this?How do I fix it?

Are you charging the battery according to the instructions in the manual? If so, you have a defective battery.

Q:i dont know whether they come with a rechargeable battery pack?? answers please im stuck?????

yes they need the rechargable battery pack if u want to recharge the batter. i think they do come with the batter pack but only 90% sure. if u don't have the rechargable battery pack it will just use the plug and play like a wired controler. meaning the controler would only work if u have it plugged in.

Q:I drive a 2000 Lexus LS400 I was told a sedan consumes less amps than a SUV or pick up

The bigger the rating the less time you may have to wait before trying to start the car. A low peak amps, CA (cranking amps) or CCA (cold cranking amps) will take longer to give the battery enough juice to start with. Think of a jump pack as a battery charger. If you put a charger on 2 amps it might take all night to fully charge a dead battery. Put it on 15 amps and it might take an hour or so. Put it to 100 amp boost and you're down to a few seconds. Do however remember to check the charge status on the jumper pack regularly. They don't hold a charge forever, and it's embarrasing when you go to give someone a jump only to find the pack is also dead!

Q:I just got an iPod dock - the Kicker IK501 - and realized that portable does not mean that it has a rechargeable battery. It uses a 22 volt DC adapter, so i am wondering if it is possible to buy a portable 22 volt battery pack so that i can use my dock without it being plugged into the wall. If there is such a thing, then please list a place where I can get one. Thanks so much!

22V is a bit of an unusual number, but modern stuff uses weird voltages. You may be able to find such a battery, but it would be costly. Contact Kicker and ask if it can operate on 24V; if so, you could use two inexpensive 12V batteries in series, or if a lower voltage would work acceptably (maybe 18V), you could use three 6V batteries in series. 14 D cells in series would provide 21.5V, which is close enough to 22V, but that's an awful lot of D cells.