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Alternative chargers, voltages and mAmps

janner43

Lurker
Hi all,

I have various chargers at home for the various pieces of kit we have.

My Asus Transformer tf101 has a charger which outputs at 15V, 1.2A
We have other chargers for phones & another tablet all with usb sockets on them.
An HTC outputs 5V, 1A
An Alcatel outputs 5V, 350mA
A Lenovo outputs 5V, 1.5A

Can anyone confirm my understanding about which charger to use and when, please?

I believe that if I use a charger with a LOWER voltage & amerage output than that delivered by the dedicated device charger, that it will NOT damage the device I charge with it - but it will probably take longer to charge. Is this correct?

So I shouldn't use my tf101 charger with anything other than my transformer tablet because it is 15v. But would it be OK to mix any of the other chargers around as they are all 5V? EG could I safely use the HTC charger on the Lenovo? Does the output amperage figure matter, or just the voltage?

Presumably I could use the 5V chargers on the tf101 - but it would take 3 times longer to charge? Could I use the Lenovo charger on the tf101 or would the higher amperage damage the transformer, even though the voltage is lower.

Advice please, helpful members
 
The voltage has the same with charger and charged device.
A 15V charger would destroy a phone and 5V charger won't charge a 15V tablet.

The Ampere of a charger just shows the maximum of current that it is able to provide to a phone.
With how much current a phone get charged that does only determine the phone.

So you have to look at the charger if it is able to provide enough current for charging the phone.

So if you presume the chargers provide exactly these currents that their own devices need, you can say:
The Lenovo charger can charge its own device, the HTC phone and the Alcatel phone.
The HTC charger can charge its own phone and the Alcatel.
And the Alcatel charger can only charge its own phone.

Whether the charging is rapid with high current or is slow with trickle current that is a matter of the phone's AC or USB charging mode.
And this is another matter ... :)

Harry
 
For all 3.7v lithium battery the charger used to charge have 5v output with 500 mA and above current. How much will be the current is totally depend on the amperage of the battery. The stock charger has designed for optimum output to charge ur phone. USB mode charge ur phone at 5v @ 500 mA current. Lower the current the battery life will be higher but charging will take time and the higher (not too high, max 50% higher than stock charger) current will be able to quick charge the battery but reduce battery life.
 
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