The different elements of the battery :

• Casing (not showed in the upper image)
• 6 cells
• Electronic boards
• Connection cable (with 2 power and 3 signal CAN communication .?)

Option 2 of this project propose an alternative since I was able to source some components ! (no initially planned)

This option is a little bit more challenging since we need to reverse eng. the communication "CAN" between the battery and the drone. (it's the proprietary "lock" that DJI add in addition to the customized plug in order to be able to sell this pricey battery)

The idea in this option is to provide the full blueprint of the Battery from scratch. 

- Assumption : the 2 electronic boards are there to complete the charging equipment ( = power supply + electronic board for cells compensation) and to provide a log and communication for the battery. 

(if this assumption is right, we can get rid of the 2 boards as we will charge our new battery with LIPO charger and not with the DJI power supply provided. The 2 boards are unnecessary extra weight) However from this point we will need to emulate the communication. (more to come)

NB: if you read something wrong or some information that could be improved for the community, please share with me and I will be pleased to update it for everyone.

Here some parts that I will hopefully receive in few weeks: 

"Compatible" plugs :

"Compatible" cells :  3.7V 2200mAh 45C  34.5g 4.84 mOhms

During this time, I will work on the communication !

Any help or advise very welcome ! thank you