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Mobile phone battery saving tips

Mobile phones have become an integral part of our life. It has influenced our lives in such a way that we cannot even live without mobile phones. Since it is a battery operated device, we expect maximum hours of operation after a battery recharge. You can make sure that your mobile phone will not become dead due to low battery, if you follow the simple steps furnished below.

One of the major causes for sudden battery drain is nothing other than playing games. This fact might make you unhappy, but if you are going to a place where there is not facility to charge your mobile phone you can think of not playing games.

If you are sure that you are not going to make any calls and there is no chance for an incoming call, then switch off your mobile phone without a second thought. Thing is that, we usually keep our phones in our coat or bag in the switched on state, even when we are sure that we don’t need mobile phones for a specific time period.

If you are in an area of weak signal strength, more battery charge will be utilized, while your mobile phone searches for signal. So you can think of switching off your mobile phone if you are sure that you will be in an area of weak signal strength for a long period of time. At the same time less battery charge is used when your mobile phone searches in a strong signal condition.

You can get more out of your mobile phone battery if you turn off the backlight and vibrate function. Ringing takes less power as compared to vibrate function.

Limited net surfing can save battery charge. Sensible use of Bluetooth will definitely help you to save battery charge.

Mobile phone battery saving tips

You can get more out of your mobile phone battery if you turn off the backlight and vibrate function. Ringing takes less power as compared to vibrate function.

Limited net surfing can save battery charge. Sensible use of Bluetooth will definitely help you to save battery charge.

Cellular Phone calling Detector Flashes a LED when detecting an incoming call Powered by one 1.5V cell

Cellular Phone calling Detector

Flashes a LED when detecting an incoming call

Parts:

R1____________100K   1/4W Resistor R2______________3K9  1/4W Resistor R3______________1M   1/4W Resistor  C1,C2_________100nF   63V Polyester Capacitors C3____________220µF   25V Electrolytic Capacitor  D1______________LED  Red 10mm. Ultra-bright (see Notes) D2___________1N5819  40V 1A Schottky-barrier Diode (see Notes)  Q1____________BC547   45V 100mA NPN Transistor  IC1____________7555 or TS555CN CMos Timer IC  L1_____________Sensor coil (see Notes)  B1_____________1.5V Battery (AA or AAA cell etc.)

Device purpose:

This circuit was designed to detect when a call is incoming in a cellular phone (even when the calling tone of the device is switched-off) by means of a flashing LED.
The device must be placed a few centimeters from the cellular phone, so its sensor coil L1 can detect the field emitted by the phone receiver during an incoming call.

Circuit operation:

The signal detected by the sensor coil is amplified by transistor Q1 and drives the monostable input pin of IC1. The IC's output voltage is doubled by C2 & D2 in order to drive the high-efficiency ultra-bright LED at a suitable peak-voltage.

Notes:

Stand-by current drawing is less than 200µA, therefore a power on/off switch is unnecessary.
Sensitivity of this circuit depends on the sensor coil type.
L1 can be made by winding 130 to 150 turns of 0.2 mm. enameled wire on a 5 cm. diameter former (e.g. a can). Remove the coil from the former and wind it with insulating tape, thus obtaining a stand-alone coil.
A commercial 10mH miniature inductor, usually sold in the form of a tiny rectangular plastic box, can be used satisfactorily but with lower sensitivity.
IC1 must be a CMos type: only these devices can safely operate at 1.5V supply or less.
Any Schottky-barrier type diode can be used in place of the 1N5819: the BAT46 type is a very good choice.
Source: RED Free Circuit Designs