That is very surprising to hear about BMX used as commuter. Simply because they are not designed for that purpose. I am looking forward to see pictures of your bike.
That doesn't make any sense.
You might like to open a new thread. This one is about battery, not a lock.
Also how would we know where you live to recommend bike mechanic?
Yes. It looks like your bike might catch fire when left in the rain.
;)
On a serious note you might like to take some time and waterproof your bike. Sounds like Eleglide didn't make that effort.
On contrary. Move to the right and all will be good.
Stay on the left and head on to collision and there will be chaos all over the place. Two idiots wining on the ground, bent wheels, bolts and other pieces.
...common sense.
Not true. It is just a tool which one needs to learn how to use.
Having that said I agree power control is better. I think torque sensor would be much better for OP.