Can we use heat radiating out of laptops to charge battery

no you can't get more than you put out. You might be able to use 100 laptops to create a trickle charge for 1 laptop.

Power adapters fail because of power spikes. You can do a preliminary test of your system's adapter by plugging it into your notebook and checking to see if the computer indicates that its battery is charging. Usually there's an LED (light-emitting diode) that flashes when the battery is charging. If you can't test the power supply using this method, take your notebook computer to a technician who can test the adapter.

Battery heating =Board problem. Or more radiation. U r running too much application in background. Disable the autostart application.(antivirus) etc download mobileguard application it would help. Www.netqin.com

You may have an air lock in the system. This is a pain with these engines, and Cadillac has a specific procedure for removing them (see Alldatadiy.com). Otherwise, your water pump may be shot, or there is a blockage somewhere in the cooling system (are you absolutely sure the thermostat is working - installed the right way?).
Also, are both the radiator fans running when it starts to overheat? If not, may have a blown fuse, or the relay for the fans may be shot.
All car manufacturers strongly recommend using an all-type antifreeze because it also contains corrosion inhibitors - tap water alone is not a good idea.

Most good battery chargers will trickle charge a charged battery - this is normal. Even with the car shut off, there will be a small drain on the battery to keep the electronics alive. HOWEVER, for this same reason, it is never a good idea to use a battery charger while the battery is in the car, or to jump start a dead battery in the car - the electronics do not like this.

Hi,
Basically Sahara Laptop heats more. As battery charge concerned it is depends upon your battery life check weather your Laptop is under warranty if it is their mince you will get the battery replacement.If it is not their mince you need to go for new battery.

It sounds like you need to clean your fans and get some new heat sink on your CPU. Then your laptop will not over heat

Please I have used about 6 HP Laptops and that is exactly the same hottness I experience.

It;s okay.

Most likely processor problem. If battery is good and power supply is working.

How do you know that it has charged to 70% and it is the correct percentage on your Laptop?May be you need some other program that are available on the internet that will tell you the exact charge percentage. Make note that In many ways, lithium-ion is superior to nickel and lead-based chemistries and the applications for lithium-ion batteries are growing as a result. Short battery life in a laptop is mainly cause by heat rather than charge / discharge patterns.Removing the battery from the laptop when running on fixed power protects the battery from heat. Make sure the AC Adapter that you are using [on both laptops] is supplying the correct voltage and if possible check with Load.

it might be hdd please shut down the computer when it is not needed...and is it radiating heat since when u purchased it??