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You've got your units all mixed up. Ah is battery capacity. You can have any battery capacity you want. What is it you want to do?

Before changing anything, how do you know that your meter is calibrated to give the correct result?

You should use a meter to measure the actual battery voltage.

I agree with most of what you say apart from the bit about 30 mph. I've had 30 mph electric bicycles, and I can tell you that it doesn't work unless somebody made one specifically for that speed with wider tyres and decent brakes and it didn't look like a bicycle. Even then, the problem is that...

You don't need an additional controller. You can use any battery you want that has the right voltage and can supply the current for the version of the BBS** that you get. The high torque version from Brightonebikes is 25amps, so you need a high discharge rate battery for that one, not the common...

You can buy any Shimano 3 speed left hand shifter. it doesn't have to ve the same type. there are loads of used oned on Ebay that don't cost much. this one is new: https://www.ebay.co.uk/itm/154078570516?hash=item23dfcc6814:g:40AAAOSwq1xfKmyL

The controller uses a overall battery voltage for LVC. The BMS uses individual cell voltages often as low as 2.5v. When the cells get down as low as 3.1v, they can't keep up with the bike's demand for current, and they go crashing down. The BMS will switch off when the first cell reaches LVC...

No. USB is only 5v and it can't supply enough power for decent lights.

Most 36v controllers are set to 30v to 31v and BMSs to 29v ot therabouts.

I'm pretty sure that you can. To be sure, you have to look at how many wires are connectd between the battery terminals and controller. If it's 2, you're good. Any more means no.

It shouldn't be anything too serious. Before anything, test whether it works with the pedal sensor after you disconnect the throttle and the two brakes. There are many different Freegos, each with many versions. You need to be a lot more specific if you want specific help. Photos of what's on...

That's not true. There's a freewheel between the bedals and the motor, so you can pedal without the motor or motor eithout turning the pedals.

The controller is always set higher than the BMS, so it's the controller that controls the LVC cut-off.

He has 3 series strips for every cell, so no problem at all. I do have one comment on that battery build: You've welded the bus strips over the edge of the battery where the negative case is. The heat from the weld could have easily melted the heatshrink sleeve, which would cause a dead short...

Also, I think the AKM128C/Q128c/QQ128C is a better motor than the MXUS due to it's ability to handle more power, which it gets from its larger internal reduction ratio. A lot of what i've said depends on what you want. what's right for someone might not be right for someone else. To get the...

You can get batteries with the integrated controllers from Topbikekit and BMSBattery. There are advantages to the silver box type controllers with block connectors compared with the integrated controllers with waterproof connectors. 1. It's virtually impossible to test the sealed connectors to...

Probably.

I was referring to the big rivnut tool in post #5. Eclipse batteries are good if they fit.

How are you going to get that massive tool in the corner of the triangle if you can't get a drill in to drill the hole?

Paypal will refund you if they BMSB don't. The only problem is that Paypal might want you to send it back before they refund you, but there's a maximum that they will cover for the shipping cost, which is nowhere near what it actually costs. Things must have changed since Brexit because Paypal...