Hello everybody, first post on XDA!
I am planning to mod my Nexus 5 battery. Considering that the dimension of the original battery is 57mm*60mm, I planned to buy 4 Sanyo 3,7V 840mAh and connecting them in parallel. I would like to post links but as a newbie I am not allowed to do so.
These are 14mm in diameter and 50mm long, meaning that 4 of them would be packed in 56mm*50mm, with 10 extra free mm where I can comfortably fit the "charging board" that I can unsolder from the old original battery. The problem here is that the charging board will probably have more than 2 pins, the others being for temperature and data. How can I deal with them? I haven't teared my battery yet, so I cannot see how the chip really looks like. Does someone know whether the data pins end up in the circuitry or are they somehow connected to the battery itself? Because in this latter case I would really have no idea how to deal with these extra pins...
In addition how will the circuitry and the phone itself deal with the increased capacity? Should I tell the phone the capacity has changed or will it auto adapt? I have read tons of posts on this topic, all saying different things...
Certainly that will increase the phone thickness and I plan on 3D printing a custom designed back-cover. Luckily the original 3D model is downloadable from GrabCAD for free, that is a good starting point. What material would you suggest me to print it in? PLA, ABS, Nylon?
Furthermore, I am planning to add a nerdy solar cell 4v, 35mA that will certainly do basically nothing except help in real emergency charging the phone while off, but it will give an awesomly nerdy look. The solar cell I am talking about is 32mm*39mm and would perfectly fit on the right of the camera.
I could fit a 100mA solar panel, or avoid the battery mod at all and just fit 5 of those solar panel for a summed max current of 175mA...
I plan charging the battery with direct connection of the solar panel to it through a diod. The only thing that worries me is that while 35mA are less than what the phone draws during standby, the battery indicator will never go crazy seing the battery tension growing while no charger is plugged in. On the other hand, higher currents, will actually be able to actively recharge the phone creating confusion to the phone that would not be able to realize what is going on. To avoid that I should connect the solar panels to the usb charging port. That would put the phone into charging mode and thus in a energy hungry more that could again cause battery to drain instead of charging or anyway to charge incredibly slow.
If someone is interested in this project and has suggestions of any kind I will appreciate and I will share the results.
I am planning to mod my Nexus 5 battery. Considering that the dimension of the original battery is 57mm*60mm, I planned to buy 4 Sanyo 3,7V 840mAh and connecting them in parallel. I would like to post links but as a newbie I am not allowed to do so.
These are 14mm in diameter and 50mm long, meaning that 4 of them would be packed in 56mm*50mm, with 10 extra free mm where I can comfortably fit the "charging board" that I can unsolder from the old original battery. The problem here is that the charging board will probably have more than 2 pins, the others being for temperature and data. How can I deal with them? I haven't teared my battery yet, so I cannot see how the chip really looks like. Does someone know whether the data pins end up in the circuitry or are they somehow connected to the battery itself? Because in this latter case I would really have no idea how to deal with these extra pins...
In addition how will the circuitry and the phone itself deal with the increased capacity? Should I tell the phone the capacity has changed or will it auto adapt? I have read tons of posts on this topic, all saying different things...
Certainly that will increase the phone thickness and I plan on 3D printing a custom designed back-cover. Luckily the original 3D model is downloadable from GrabCAD for free, that is a good starting point. What material would you suggest me to print it in? PLA, ABS, Nylon?
Furthermore, I am planning to add a nerdy solar cell 4v, 35mA that will certainly do basically nothing except help in real emergency charging the phone while off, but it will give an awesomly nerdy look. The solar cell I am talking about is 32mm*39mm and would perfectly fit on the right of the camera.
I could fit a 100mA solar panel, or avoid the battery mod at all and just fit 5 of those solar panel for a summed max current of 175mA...
I plan charging the battery with direct connection of the solar panel to it through a diod. The only thing that worries me is that while 35mA are less than what the phone draws during standby, the battery indicator will never go crazy seing the battery tension growing while no charger is plugged in. On the other hand, higher currents, will actually be able to actively recharge the phone creating confusion to the phone that would not be able to realize what is going on. To avoid that I should connect the solar panels to the usb charging port. That would put the phone into charging mode and thus in a energy hungry more that could again cause battery to drain instead of charging or anyway to charge incredibly slow.
If someone is interested in this project and has suggestions of any kind I will appreciate and I will share the results.
