After market battery for Magnum Cruiser?

[rvehock]

The funny thing is our bikes are just a rebrand of the moscow ebike brand. The battery is a rebrand of dehawk battery. You can get the real battery here much cheaper. The 18ah works great and can get you 60miles with pa, the website claims that shipping is free?

https://www.leoncycle.com/replacement-battery-for-ncm-moscow-aspen

 

[Fred]

I wanted to carry a spare battery (for long trips) in my saddlebag, but the spare battery I have is not the REENTION DORADO-PLUS case battery, that is on the bike. My thought was to tap into the connection between the controller and existing battery and also install a DPST switch to enable one or the other. Because the REENTON battery/case is so integrated to the frame and connection to the controller seems to be buried inside the frame, I'm just trying to figure out how and where would be the best place to make this connection. Any ideas or has anyone done something similar?