I thought it would be useful if we could use our RAD eBike battery for back-up power or for camping. I designed and 3D printed a battery adapter. I also verified that you can use an MPPT solar charge controller to charge the battery. You can charge it at 120W while using the output power. Now we just have to convince RAD Power to manufacture/sell something like this as an accessory 🙂

I put the 3D print files at: https://www.prusaprinters.org/prints/70263-rad-power-ebike-battery-adapter

https://youtu.be/vP13pjChTB4

My wife wanted a way to have easy access to her cell phone while she was riding. Her Radcity Step-thru 3 has four bolt holes on the front fork. They can be used for a front rack. I designed a small box to hold her phone that uses these bolt holes. I also used the front facing surface to mount reflective tape to make her more visible at night. I mounted it on the biker's right side so it would not interfere with the cables.

I put the 3D print file at: https://www.prusaprinters.org/prints/70058-rad-power-ebike-phone-holder and at: https://www.thingiverse.com/thing:4895813

This is my first cut. I'm thinking of making a lid that flips to the side so the compartment would be waterproof. Any other suggestions for improvements?

I bought my wife a second battery for her Rad Power Radcity Step-thru 3 (2021) eBike. I needed some way to attach it to the bike. I designed and 3D printed an adapter that mounts to the rear bike rack to hold the battery. You can lock the battery to the rack. You can also use the adapter as a wall mount to hold the battery during charging

I put the 3D print file at:
https://www.prusaprinters.org/prints/69891-rad-power-radcity-ebike-battery-holder-for-rack-or

Youtube video showing design: https://youtu.be/5yk3gQ04PdQ

Anyone know what the three small pins on the battery connector are for? The two large pins are +/-.
Looks like it's a Halong 5-pin connector. I'm trying to understand the communication protocol between the battery and the controller. I assume it a serial connection?