How to turn on the phone without the battery? Can the phone work without a battery?
Without using the battery, you can activatealmost any phone. In what cases does it become necessary? There are various emergency situations when the battery is lost, and important data is left, or, for example, if the phone is part of a burglar alarm system or a listening system.
Operating the phone without battery
Can I turn on the phone without the battery? There is an opinion that for this it is enough to put it on charging, after which you can turn it on, but it's not so. A typical charging device involves working with a battery, where it first accumulates, and then gives off current. The device can not be powered directly from the charging: because the current is too low, the voltage will immediately drop to zero as soon as you try to "wake up" your phone.
To start the device, you need to makealone or buy a stabilizing power supply that generates a constant voltage of 3.7V with a maximum current load of not more than 2 A. The required voltage must in no case be higher than the permissible value, even at the moments of on / off and load fluctuations. Please note that the power supply unit is protected against overvoltage in the event of a malfunction, and also has a prevention in the event of a short circuit. How to turn on the phone without the battery?
Instructions for turning on the phone without the battery:
Turn off the phone, and, disconnecting it from the charger, remove the battery.
Using a voltmeter, find two contacts on it that correspond to a voltage of 3.2 to 3.7 V. Determine the active polarity of the contacts.
Supply the required voltage from the systemuninterruptible power supply to suitable contacts in the battery case. You can solder the ends in the event that the phone is not otherwise operated (in this case, the power supply unit should be de-energized).
Turn on the power first and then start the phone.
To check up serviceability of the received system it is possible so: to connect phone to security system by means of a USB cable that thus the general wire of the circuit has been disconnected from the power unit.
It is important to remember that in the event of a voltage failureor disconnection of the contact, the phone will instantly turn off. If the device is part of an alarm system, care should be taken to ensure that it is equipped with an uninterruptible power supply unit that must be reliably protected against temperature fluctuations.
Tip: Instead of a power supply, you can make an adjustable stabilizer, and stretch the voltage, for example, from the computer. Many old phone models (namely those most often used for automatic redial for security purposes), require the addition of a resistor, and some devices with four-pin batteries sometimes need two resistors.
Some models are equipped with a reading systeminformation from a chip that is embedded in the battery. For example, the power from the Siemens battery is removed at the end terminals. Between them, information contacts are displayed, which allow the phone to identify the battery: NiMH or LiIon. These contacts are connected, as a rule, before the last terminal to "minus" through 20 kΩ. Such a resistor is a temperature sensor during the start-up of the battery and is located inside the battery.
To connect it you need:
make a "model" of the battery with pads for contacts or use the body from a similar battery;
on the pad solder contacts with resistance, similar to what is required in the battery;
the wires from the power supply are soldered, the main thing is not to mix up the polarity.
As you can see, you can turn on the phone without the battery, for this you need only some adaptations and knowledge from this article.
