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<blockquote data-quote="aroy" data-source="post: 293926" data-attributes="member: 16090">Unlike the old torch batteries, the modern rechargeable batteries have a controller chip embedded. That chip determines at what state of charge/discharge the battery is, and relays the information to the device. Though the base batteries are made by only a few OEM, the battery packs used by devices can be made by any one. All you need is to get the base battery from OEM, program your own chip, package it and sell it.The problem arises when you do a sloppy job in programming the chip. This may result in faulty dialog and at time over charging, which has resulted in a lot of destroyed devices, and a couple of deaths.If you are interested in lower cost solutions, then you have to know how to dismantle the battery pack. Then replace the base battery with a similar (or even the original version) and reassemble the pack. This is done regularly by UPS users, though there the technology is much lower. In India, there are quite a few repair shops who do this regularly for Laptop batteries, but I have never heard of any one doint it for either the mobile or camera battery. May not be worth while.</blockquote>

[QUOTE="aroy, post: 293926, member: 16090"] Unlike the old torch batteries, the modern rechargeable batteries have a controller chip embedded. That chip determines at what state of charge/discharge the battery is, and relays the information to the device. Though the base batteries are made by only a few OEM, the battery packs used by devices can be made by any one. All you need is to get the base battery from OEM, program your own chip, package it and sell it. The problem arises when you do a sloppy job in programming the chip. This may result in faulty dialog and at time over charging, which has resulted in a lot of destroyed devices, and a couple of deaths. If you are interested in lower cost solutions, then you have to know how to dismantle the battery pack. Then replace the base battery with a similar (or even the original version) and reassemble the pack. This is done regularly by UPS users, though there the technology is much lower. In India, there are quite a few repair shops who do this regularly for Laptop batteries, but I have never heard of any one doint it for either the mobile or camera battery. May not be worth while. [/QUOTE]

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