All rechargeable batteries such as cell phones, cordless phones, laptop computers, etc., need to be allowed to fully discharge and then recharge to full power to prevent them from acquiring a "memory". If they are always kept at full charge, then it will actually shorten the battery life, making the time between re-charging shorter.
Phone off: Your phone will show a full battery and say "Fully Charged" Phone on: on the right top corner your battery will show a full battery and blink
Most batteries today are sealed so a hydrometer is useless. A fully charged battery will read 12.6 volts with a digital volt meter. At 75% charge it will read 12.4 volts, at 50% it will read 12.2 volts and at 25% charge it will read 12 volts. But if you have another type battery then here is what you need to know. A fully charged golf cart battery or fork lift battery will read 1300 A fully charged auto or truck battery will read 1275 A fully charge cell phone tower or solar storage battery will read 1250
Most batteries today are sealed so a hydrometer is useless. A fully charged battery will read 12.6 volts with a digital volt meter. At 75% charge it will read 12.4 volts, at 50% it will read 12.2 volts and at 25% charge it will read 12 volts. But if you have another type battery then here is what you need to know. A fully charged Golf cart battery or fork lift battery will read 1300 A fully charged auto or truck battery will read 1275 A fully charge cell phone tower or solar storage battery will read 1250
On a fully charged battery, the Motorola RAZR V3 has up to 280 hours of standby time and up to 7 hours of talk time. If GPS is enabled it will drain the battery faster regardless of whether the phone is in standby mode or in use.
It dies a slow death until it's put back in the phone and charged. If it's a phone your not using all the time taking out the battery when not in use will prolong the charge.
I think the only damage you can do is unplugging it before it is fully charged
Even when a phone is off - it still uses a minute amount of power from the battery. It constantly checks the circuitry to see if the power button has been pressed. Even a fully-charged battery will eventually run down in a phone that's switched off.
Every cell phone is different when it comes to how long the battery will last. If your phone is fully charged it should last at least twelve hours. If you frequently get emails and text it may be a little less.
Because it wants to.
If you're asking about the car battery, the practical answer is "No."; the drain on the car battery would be negligible. The current used would be significantly less than 1 of your interior dome lights while the phone is charging, and once the phone is fully charged it (and the charger) would consume even less. If you're asking about the phone's battery, the only effect would be a charged battery. The process does not promote an unhealthy state for either battery in any practical or realistic scenario.
No
Yes, without being charged, a phone will run out of battery.