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Balance charging for the Fatshark battery case: Mod Tutorial

16/8/2019

4 Comments

 
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Recently I made my biggest ever FPV purchase - the Fatshark attitude V5 FPV goggles with the new 30 degree FOV OLED screens. I'm still field testing these for a review which will follow but first I wanted to look at the battery case, more to the point, how to fix the shortcomings.
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The Fatshark 18650 battery holder comes with the Attitude V5 or can be bought separately
I love that you can use 18650 cells to power the goggles because lithium ion cells are much better suited to the task given their big capacity. The problem is that the battery holder has an incomplete balance connect meaning you cannot charge them. Since I don't have a dedicated 18650 charged I've modded my case so it can be charged safely using a regular balance charger. Note, the Fatshark 18650 battery holder can be bought separately here and can be used with any goggle.
In this tutorial I rectify this issue by showing you how to safely open the case and mod it to allow for real balance charging whilst losing noe of the rest of the functionality. With this mode you do not need a special charger for 18650 cells, you can use your regular balance charger and charge your pack safely and efficiently. If you need batteries a local vape shop will probably have the best prices but if not then I used these 3000mah ones that have been rebranded.
Tools needed
  • Craft knife
  • Small Philip-head screwdriver. This set looks good if you don't have one.
  • Soldering iron. I use the excellent TS100
  • Solder. This is fine
  • Flux (optional but recommended). I use this cheap stuff
  • An old battery-end balance lead. Or if you buy this one you won't need the extra wire below
  • Some extra 20-26 guage wire. This is cheap in 22AWG
See below how to complete the work. This took me about 30 minutes. Most of the time was to figure out the best path for the wire and make the path for it accordingly. As always, pictures can be embiggened
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1. Remove the read sticker and then remove the 2 screws that were hidden behing  the sticker. Gentle pry the clips off to remove the cover as above
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2. Slide out the battery connecting plate as above
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3. Tin the battery connecting plate as above. Scrape where you wish to solder, use high heat and flux to make it easier
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4. Solder on a 20-26AWG wire that is at least 10cm in length

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