This guide is intended to help people better understand the process of disassembling a Rio Nitrus for the purpose of replacing it's battery. I have not found instructions on the net to describe the process of disassembling a Rio Nitrus so I disassembled a nitrus I have. The process I went through was as follows.
There is 1 screw on the back of the nitrus which you would remove using a Torx driver.
Once the screw is out, the back of the unit is only held on with 4 plastic clips (which are attached to the back cover) 2 on each side of the cover.
The back can be gently taken off however care is needed as the back cover is stuck to the unit via double sided adhesive which is affixed to a metal plate on the backside of the LCD area. I opened it by gently inserting a small screwdriver between this back plate and the back cover.
Once the back cover is off, the battery is clearly exposed.
To remove the battery, again you need to be gentle. The battery is affixed to the inside of the unit by double sided tape. The tape is not the issue. Sandwiched between the battery and the double side tape is a small temperature sensor that is soldered into the PCB. You need to gently separate the battery from the tape without damaging the temperature sensor or tearing its flying leads from the main board.
Once the battery is off the tape, simply unconnect the battery. The battery has a connector at the end of the leads, which you just disconnect.
Plug the new battery in, place the battery on the double side tape and reattach the back cover.
New battery should be charged for at least 8, preferably 24 hours before use.
Overall, the process is fairly straight forward however care must be taken especially around the double side tape/ battery/ temp sensor.
Please note that we are not responsible for any damages that may occur and that if users who are not gefortable performing this operation, should solicite the help of a certified service bureau.
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