Thread: Charging with external battery - possible?
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Fontus is offline Fontus
2010-03-15 , 13:59
Posts: 34 | Thanked: 20 times | Joined on Jun 2009 @ Bulgaria
#15
Originally Posted by riderman View Post
thats right... but If there are 4 one-way AA Batteries inside which can be changed it should work. Back in civilisation after 3 days I have to buy new ones... Not eco-friendly I know... But an acceptable solution for for exceptional circumstances.
There is no way 4 AA batteries could provide enough work time because most of the energy will be used to charge the battery inside the N810, so it will go in the air as temperature. For example the Nokia emergency charger (a link was given before in this theme) is 1500MAh (i.e. = the BP-4L) but provides only 3 hours work time (according to the official specifications). However, (see below)

Originally Posted by riderman View Post
Another possibility could be this: http://nokiaport.de/index.php?mid=5&pid=akkuersatz - on this site is a circuit diagram for externaly powering Nokia devices without a battery inside. Do you think that it ist possible to use 3 AA reuseable AA batteries with 1,2V (maybe a bit more...) each - 3,6V together and this diagram but without the diodes D1 and D2? Or will the current be to high without the low drop regulator?
I didn't know that such things exist. I can not tell anything about the diodes but if you manage to somehow use directly AA or other batteries with no battery inside N810 then I think you will have good work time because all energy will be used by N810.