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Stronger charger.
I wonder if I can use stronger charger (with higher current) to use with my N900. I am thinking about AC-60 by Nokia (1500 mA). Could it be dangerous for my phone or battery?
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There's some basic physics at work here; you need to understand the meanings of the ratings given to electronic devices.
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Re: Stronger charger.
Will my light burn more brightly if I replace a 10A fuse with 16A?
Come on, people, it is not that difficult. The charging current is determined by the lower of the two limits: the charging circuitry in the phone and the rating of the charger. A stronger charger with the same phone will have no effect whatsoever. EDIT: Thanks, juice, for a more detailed answer. You beat me to it :) |
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As long as we are on the subject, let's keep this going and try to teach people a bit. Might come handy at some point. So. There are three basic measurable electrical properties usually involved, and 2 basic physical laws, Ohm's law and Kirchoff's second law. Generally; when circuits are connected together so that energy is transferred from a source circuit to a drain circuit the following principles apply;
In both of the 2 last bullets the end result might be that you will have smelly blue smoke coming out from either the source or the drain. This is why people in Electrical Engineering business often say that circuits work by smoke. When the smoke escapes, the circuit no longer works. |
Re: Stronger charger.
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Quite a few phones these days come with a 'standard' charger that's rated at 5V 1A or 1.5A or whatever and the phone will only draw that. But, they may support Qualcomm Quickcharge standards despite the phone only coming with a basic 5V USB charger. Quickcharge bumps the voltage up to as much as 20V and current to 3A if you have a compatible charger. Also there's issues with some phones getting 'confused' by some USB chargers and requiring 'fast charge' cables which essentially just short the two middle pins on a USB cable to convince the charger it's not an old iPhone. The N9 for instance just fails to work with many 'standard' USB chargers and battery packs designed for iDevices. I've still got a couple of dongles that shorted the middle pins that I carried around with me so that I could use other people's chargers. And lastly, I've lost count of the number of people I know who think any old USB socket is going to be good enough and don't realise that the max draw on some cheap chargers is only 500mA and they've been using one for ages without realising a better charger would help. |
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Luckily there's a protocol between the charger and device for negotiating the supported charging parameters, the newer chargers are not going to blindly push up the voltage to the high limit :D |
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But yes, for the sake of completeness, thanks for pointing that out. |
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Am I way off the mark with recalling that LION batteries do best with a slow charge rather than fast, so a lower Amp charger whilst slower is "kinder" to the battery?
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