Keeps turning off. battery is 100% charged. never got wet

Start by checking the battery. For a wet (lead acid) battery:

VOLTAGE (OCV) STATE OF CHARGE
12.8 100%
12.6 75%
12.3 50%
12.0 25%
11.8 0%

For an AGM battery:

VOLTAGE (OCV) STATE OF CHARGE of AGM Battery
12.7 V 100%
12.6 V 75%
12.3 V 50%
12.0 V 25%
11.8 V 0%

So all batteries are pretty much the same.

Then after seeing what surface voltage you have an recharging if low, the next step would be to get a load test done on the battery and clean and tighten the battery cable attachments at both ends of the cables. If it is not a problem here the next step would be to diagnose the starter and the starter system for which information as to exactly what happens when you activate the starer is necessary

Ted try this once more:

1. turn off the machine.
2. keep pressing the off switch a little longer 3. remove the battery.
4. press the off button for say 15 seconds.
5. re-install battery after a few minutes.
6. connect charger to computer and see if it shows % charge.
7. when it shows 100%disconnect charger and see if the battery still shows 100% If it does you are now reset. IF not,will cross the bridge then.

I have some tips to keep your laptop battery live longer
1.don't undercharging and overcharging,laptops battery can reach 100 degress Fahrenheit and such heat can damage your battery. slowly but sure
2.ideally,you should try to keep your battery charged from 20 percent to 80 percent. i know it's inconvenient to unplug the charger before it reach 100 percent,but try to keep it charged near 80 percent
3.try to charge your battery constanly,and unplug it when you think its almost fully charged,overcharged can heat your battery and damage it
4.keep your laptop as cool as possible,don't try to charge the battery when the computer is turned on,even if the battery is going to 0 and you still need to use it,just shut down the laptop first and charge it,at least until the battery is charged 20%,unplug the charger and turn it on

Well,there are many other tips to keep your battery alive,but i only have those 4,thanks for using fixya
and good luck with the tree-planting project,i love environment very much

If the laptop battery is more than 3 - 4 years old then the battery could be worn out. Rechargeable batteries have a finite number of charge and discharge cycles and will lose their charge capacity over time, i.e. won't charge to 100% and gradually the charge reduces until the battery won't charge up at all. OR The battery shows a 100% charge but when the adapter is disconnected the battery drops off to zero capacity in a very short time. If the battery drops to an unacceptable charge level then the battery needs to be replaced.

Not really, the older NiCad batteries get a memory effect if you keep charging from a half charged state, but modern Lithium batteries do not suffer from this problem.
If thelaptop battery is more than 3 - 4 years old then the battery could be worn out.These rechargeable batteries have a finite number of charge and discharge cycles andwill lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up at all. OR Thebattery shows a 100% charge but when the adapter is disconnected the batterydrops off to zero capacity in a very short time. If the battery drops to anunacceptable charge level then the battery needs to be replaced.

Ifthe laptop battery is more than 3 - 4 years old then the battery could be wornout. Rechargeable batteries have a finite number of charge and discharge cyclesand will lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up atall. ORThe battery shows a 100% charge but when the adapter is disconnected thebattery drops off to zero capacity in a very short time. Ifthe battery drops to an unacceptable charge level then the battery needs to bereplaced.

Ifthe cell phone battery is more than 3 - 4 years old then the battery could be wornout. Rechargeable batteries have a finite number of charge and discharge cyclesand will lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up atall. ORThe battery shows a 100% charge but when the adapter is disconnected thebattery drops off to zero capacity in a very short time. Ifthe battery drops to an unacceptable charge level then the battery needs to bereplaced.

Sometimes the new battery is not 100% charged. Put it on a charger or jump start the car, the alternator should then charge up the battery.

My phone does that too randomly. It hasnt lately though and I truly never drop it much. I am having a problem now with my battery