Nikon F5 Rechargeable battery

thingiverse

# Nikon F5 Rechargeable battery I always wanted an old film camera, when I finally got one (a really old Nikon F5) I discovered that this amazing camera needed 8 AA batteries! and it lasted so little, maybe 4 rolls. I searched for some similar projects and I found out that Nikon made an old rechargeable batteries for the camera, the NiMH Batteries (MN-30). Probably they are so old that none of them work today. I was familiar with lithium ion batteries (18650) and I just jump to try it.   --- # Disclaimer **I tried my best and I stopped trying when I get it working. Is not a perfect design, it was particularly hard to fit the 3 batteries and the 3S BMS (battery management system) inside the amorphous space inside, but I got it working and it work wonderfully. The last time I charged this was 2 years ago!** **Li-Ion Cells can explode if you puncture them or if you overcharge or overdischarge them. I am not responsible for this. If you're not sure about this google about them until you feel comfortable** --- ## Materials - **3x Li-Ion Rechargeable cells 18650** - [I used the ones inside an old laptop battery, the work perfect](https://www.instructables.com/REUSE-YOUR-OLD-LAPTOP-BATTERY-TO-MAKE-A-POWER-BANK/). **Just make sure they are all the same voltage and be very carefully** - **3S BMS 20A** - I used the HX-3S-FL20 REV2.2 Probably they are more models similar to this, this was the name I found. This is for controlling the charge and discharge of the batteries, the most important thing here is to not overcharge or overdischarge. - **Some cooper sheet or wires** - I used the copper sheet to make the cables. I tried to make with wires but when I needed to part that the cells connect it was easier to use the sheet wire directly. Try whatever feel better for you. - **A female Barrel Connector** - You can use any connector. I made an slot for a naked barrel connector that I decimate in order to use it - **Heat shrink tubing** - Mostly to cover the exposed cables and exposed sheet wire - **2x M3 Screw for the lid** ## Wiring As the name says, is a **3 in series Cells**, that adds up to **11.1V**. In some cases a little more and that's good because with a little more voltage (up to 12V) you can take more photos per seconds, a nice little thing that a learned making this. The original the **MN-30** was 12V according to my research (don't quote me on this, there is so little info about this)  I tried to position the cells and the BMS in the best location posible, but some cables need to do some travelling around. - **Note: they are soldered on the other side of the PCB**   The are some crazy wiring here, but it is not that complicated. Note that we need to connect after every cells in order to let the BMS the status of every cells and charge it according. - **B1 and B2** connect two cells together  Finally we need to connect the charger wiring. Just Solder into the PCB and pass it to the other side. - **Note here that is the same wiring for loading and unloading, so just we just connect the barrel connector in our way to the pads**  Then just cover it with the convenient lid that I made :) You can use the same original cover, it need some movement to get it fit but it works! ## Some fixes - **If you are looking the battery from the top with the camera pads to yourself you have to bend them like and arch and to your right**