lower amp is fine unless your handphone able to adopt different of load and adjust the charging speed without burden the USB charger...

if the handphone are hunger for power and must use certain amp to operate the charging functionality... if may overload the USB charger, overheat and burnt... worst come to worst, the insufficient load may damage the handphone, but for current technology the handphone should able to adopt at least computer's USB port's power load...

example: i used a power adapter with 1amp only for a equipment, end up the power adapter overheat and burnt after 15 minutes usage... as i checked with adjustable PSU with same voltage, the equipment required 3-4amp at least... means the equipment sucking more power from power adapter and more burden...

example:
our house TNB power source is 230V @ 13amp... but u used 230V @ 1amp++ equipment without any issues...

but if u using the equipment required at least 15amp, definitely will overload the wiring and ELCB may trip...

FYI, our common USB port just deliver 0.5amp to USB devices, believe most of smart phone users used the USB port to charge their smart phone (if forced to do so)... due to this issues, most of motherboard manufacturer offered the USB port with higher amp 0.9-1.8amp if detected smart phone for charging purpose... it can be fasten the charging speed and reduce the USB port's burden...

but still still recommended to use the stock charger, believe that they have the reasons to design the power adapter based on their hp's requirements, maybe some hp cant suit with different power adapter... otherwise maybe the cost concerned to manufacture power adapter that higher amp = better component = higher cost...

anyway, i have a adjustable PSU which can support up to 30V @ 18amp, but i plug the power source on customer's equipment for check up purpose which required 12V @ 2amp (of course i have to adjust to 12V as ouput butamp load no adjustable)... no problem so far...


it can be the safety features of the handphone to prevent overload ur power adapter and ur handphone forced to suck more juice from it...

in the market have 5amp power adapter, as what i said cost concerned and lead higher price which doesnt bring much beneficial to hand phone users and manufacturer as hp just required around 1amp...

but... i still will stick with my stock charger to prevent unnecessary hassle in the future...

This post has been edited by gkl83: Jun 18 2011, 11:19 AM