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electrifying
I needed replacement plugs for rechargeable batteries (eg from mobile phone devices) and had heard alot of alarming statements (no pun intended) on general related websites, all telling me to avoid third party adapters that had an incorrect or higher output in voltage or current than what a device required, as this could potentially wear a battery out alot quicker if the output does not match the device completely-or even be dangerous. I have some questions that I hope someone out there can help me with:-
1-I needed a replacement adapter for a mobile phone. It is rated at 3.7V 1000mA, yet a popular unofficial mains charger that I bought for it online, is rated as having an output of 5V 1200mA. Is this safe to use? I have been told that the minimum mains output is often usually 5V minimum-is this true?
2-Another rechargable mobile device requires 5.2V 450mA and can also be charged via USB on a computer, but one unofficial mains adapter thats stated to work for it, is found to give out 5V 900mA. Again is this adapter safe with a ever so slightly lower voltage and much higher outputted current?
3-Would an adapter giving a higher voltage to the device, be less safe than one giving a higher current than the device, or does a device with a rechargeable battery for both voltage and current only ever take whats needed? If a mains plug could be dangerous to a rechargeable device, eg giving out a far higher voltage or current, would this difference have to be far greater than what the device required (eg either twice of whats needed)? Both plugs output as dc, for these devices which are also labelled as dc.
Sorry for the lack of knowledge and multiple questions for what may be something of not much importance, but I suppose this is what this forum is for, and would prove to be something worth knowing for future reference. thanks for any help
1-I needed a replacement adapter for a mobile phone. It is rated at 3.7V 1000mA, yet a popular unofficial mains charger that I bought for it online, is rated as having an output of 5V 1200mA. Is this safe to use? I have been told that the minimum mains output is often usually 5V minimum-is this true?
2-Another rechargable mobile device requires 5.2V 450mA and can also be charged via USB on a computer, but one unofficial mains adapter thats stated to work for it, is found to give out 5V 900mA. Again is this adapter safe with a ever so slightly lower voltage and much higher outputted current?
3-Would an adapter giving a higher voltage to the device, be less safe than one giving a higher current than the device, or does a device with a rechargeable battery for both voltage and current only ever take whats needed? If a mains plug could be dangerous to a rechargeable device, eg giving out a far higher voltage or current, would this difference have to be far greater than what the device required (eg either twice of whats needed)? Both plugs output as dc, for these devices which are also labelled as dc.
Sorry for the lack of knowledge and multiple questions for what may be something of not much importance, but I suppose this is what this forum is for, and would prove to be something worth knowing for future reference. thanks for any help
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It sounds like both of these third party replacement chargers should be relatively safe from what everyone has mentioned. My initial concern was with current-the adapter of the second device giving out twice the mA than required, but if all modern devices only ever take what is required, then that adapter should be safe. One website had stated that a mains adapter with a far higher current might wear the rechargeable battery out faster, and that was what got me into posting in the first place. 
