Voltage is regulated by the bq24150 chip. In both cases, it will not supply the target 4.2V to the battery at the start of charge from near-empty, because that would need more current than wall charger and usb combined could provide ;-)
At the end of charge, both methods will reach the same battery voltage.
Voltage is regulated by the bq24150 chip. In both cases, it will not supply the target 4.2V to the battery at the start of charge from near-empty, because that would need more current than wall charger and usb combined could provide ;-)
At the end of charge, both methods will reach the same battery voltage.
Just to clear up your statement, the chip in your PC is rated at 4.75v to 5.25v at 500ma. Your N900 takes that voltage and regulates it down to the 4.20 volts to charge the battery.
I charge my N900 via the wallcharger every night, whether it needs it or not, to guarantee a full charge next morning. It's connected for 8 hours or so. Never noticed any battery issues and I've been doing that for 16 months.
Question: I also have a brodit active car mount, and a USB type wall charger with microUSB adaptor. I use both of these infrequently to top up as and when needed, the car charger more so. Is this likely to affect the battery life in any way?
