Lithium 12 Volt Battery

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FAQ

If I unplug the 12V car plug, rechargeable built-in battery of GPS lasts lt; 5 mins. I want to use it for walk-navigation. Is it possible to assemble 8x 1.5V AA batteries (12V) and power the GPS? How should I do it? Will it work? Ampere-hour considerations etc?

The battery in your GPS has failed. It should provide a few hours use. Consider replacing that battery. What you should otherwise do, to directly power it, is use four AAs in series (or 8 in series parallel) to power the GPS directly on its DC adapter input, with the 4.8 to 6V. The 3rd option, is to get a standalone trail/hiking GPS.

Use 8 AA batteries (1.5V per section) to get a battery pack with a voltage of 9.6V

5 rechargeable battery voltage is 1.2V a, so with 8 AA rechargeable batteries get the output voltage is just 9.6V. Can replace the 9.6V single battery, such as to be more durable, as long as the capacity of some of the battery on it.

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.

I just bought a new xbox 360 controller with the rechargeable battery pack and cable. I charge the battery fully but it only holds its charge for about 30 min before it dies. I just bought this. It is brand new. Is this how long these things normally last while not plugged in?

They take 4 hours to charge. Make sure they are fully charged. If they are only holding 30 minutes, you may want to go return them as they sound defective.

i found a couple of package deals, some with the battery pack and some without. do you need the battery pack for the wii to work or can it work with it? also if it is an addition what does it do?

The Wii fit board uses batteries. The battery pack is for the board, you can play without it by using disposable batteries but if you play it everyday as you should you'll burn up a lot of money on batteries. I would get the battery pack. I have one and there is no telling how much money it has saved me.

I am creating a lighting system for a replica of The Ghostbusters Proton Pack. I have two different battery operated holiday light sets to reproduce the effect the movie props had. Both use 3 AA batteries can I wire a single battery pack and a toggle switch into both? I assume I would then need 6 AA batteries? Thanks in Advance!

Batteries in series add their voltage. Batteries in parallel add their current capability. By hooking both lighting systems to one battery pack you are going to drain the batteries faster. The concept of 6 AA batteries I would use 3 D size batteries if I was working with lighting so the battery would last longer and if I used rechargeable batteries, I wouldn't have to recharge them as often. Just some friendly advice - Garth

I have a few cheap LED flashlights that I would like to power with a 7.6 volt R/C car battery pack. I used to power a regular bike light with it, but the bulb was for 7.5 volts. I'd like to go LED for better battery life. All the LED lights use 3 1.5 aaa batteries. Do I need to add anything (resitors, capacitors, etc.), or are they already in there? Any help would be great.

Your 3 batteries add up to 4.5 volts so you may risk damage to the leds, One method would to add a 5 volt regulator which has 3 tabs--input (where you put the positive lead of the battery, ground, and output which should supply 5 vdc to your leds

I have an electric scooter with a brand new 24 volt battery pack. When I charge the battery the voltage gets as high as 28 volts or more. I bought a brand new charger that has a 1.8 amp output rating. The charger light stays red while charging and should shut off when it turns green. So far I have not let the charger charge until the green light comes on. I am concerned that I am overcharging the battery. Right now my multimeter reads 28.48 volts. Is this normal? Thanks in advance.

You sound like Steven Wright: I bought a pack of batteries, but they weren't included, so I had to by them again. AA