Li-ion battery pack monitor & maintenance project for my EV motorbike.

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I try to build a little circuit that will control a charge/discharge maintenance cycle for my removable EV battery packs when my bike's in long-term storage pending sale.
I turned out to be a marathon not a sprint.
Using A Raspberry Pi, an INA237 power monitor chip, a pair of relays, a pair of MOSFETs (the source of much confusion), the battery's supplied charger and a 100W load. Here's what I did.
Programming was done in Python and is very basic as it's not my normal weapon du choix.
The INA237 chip communicates over I2C and has a trap built in for me!
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[@exxosuk]

Always the simple stuff which becomes the biggest pain :P Use a heatsink for those gold resistors, they go with a almighty bang else :)

[@thetechnoshed]

You haven't seen part two where I my total incompetence gets fully revealed yet...

[@exxosuk]

@@thetechnoshed Educated people are not good with simple stuff ;)

[@Chriva]

"16-bit but always positive" Could also mean exactly that. 16-bit unsigned. Thus going to 65535 :)

[@thetechnoshed]

It says it's an always positive two's complement (ie. signed) 16 bit value. Surely that means bit 15 must always be 0. Therefore it's only a 15 bit value? Or have I read that wrong. What else could the two's complement part mean?