MobileRead Forums - View Single Post - PRS-950 (and others): Battery replacement ever done by yourself? Result?

FraPe · 04-04-2019, 03:18 AM

I am not an electrical engineer but as far as I understood the article at hackaday the reason is not a battery too old it is the so called 'security' Sony built in. I tried it with two batterys as stated above and have the same issue with both. So I will try to solve it in the way as described at hackaday.

This so called 'security' mechanism is built in nearly everything that needs batterys and other 'perishables'. I know it from printers (ink cartridges), from cameras (battery), ... The producers are building them in to a lot of electronic parts to prevent users from using 3rd party batterys, cartridges, etc. They tell us that this is to prevent issues but in reality this has a commercial background. Never had any issues with 3rd party batterys or cartridges when they build in a chip to overcome such 'security'. But in the case of the PRS-950 it seems that there is no such chip built in to the battery and therefore this issue happens.

As an example for this:
https://forums.theregister.co.uk/for...c_battery_drm/
Sony also is doing it:
https://www.sonyalpharumors.com/new-...rty-batteries/

Indeed the way of the implementation is different but the result is the same: You cannot use the 3rd party battery as spare part!

04-04-2019, 03:18 AM	#12
FraPe Enthusiast Posts: 49 Karma: 46572 Join Date: Nov 2009 Device: Sony PRS-500, PRS-300, PRS-950 and Archos 9	I am not an electrical engineer but as far as I understood the article at hackaday the reason is not a battery too old it is the so called 'security' Sony built in. I tried it with two batterys as stated above and have the same issue with both. So I will try to solve it in the way as described at hackaday. This so called 'security' mechanism is built in nearly everything that needs batterys and other 'perishables'. I know it from printers (ink cartridges), from cameras (battery), ... The producers are building them in to a lot of electronic parts to prevent users from using 3rd party batterys, cartridges, etc. They tell us that this is to prevent issues but in reality this has a commercial background. Never had any issues with 3rd party batterys or cartridges when they build in a chip to overcome such 'security'. But in the case of the PRS-950 it seems that there is no such chip built in to the battery and therefore this issue happens. As an example for this: https://forums.theregister.co.uk/for...c_battery_drm/ Sony also is doing it: https://www.sonyalpharumors.com/new-...rty-batteries/ Indeed the way of the implementation is different but the result is the same: You cannot use the 3rd party battery as spare part! Last edited by FraPe; 04-04-2019 at 03:59 AM.