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Strange, I haven't had any problems (yet) been using mine for a couple of years with the standard battery, and a few weeks with the new battery. Can you post a link to the new controller? I might buy one as a backup! There's limited space to do the splice and run cables in the standard...

There's a picture on this thread called 'connection' - it shows the black and red wires, I spliced these, hope that helps

Spliced the wires going into the controller - thanks for the suggestion. Added a 500Wh 36V battery - a very worthwhile upgrade. The bike can now run in the highest power mode, and I think the top speed has increased (entered a smaller wheel size to unlock). With a separate bike computer I'm...

That's just the job! Thanks

There's a battery test button - that wakes the battery. Looks like the centre pins are positive and one other is ground and one unused?

Theres a power button on the display. I've taken the mount apart. There are just two wires red and black from the controller. Annoyingly the wires aren't exposed on the controller side to directly see how they are connected to the battery terminals. The inner terminals are shorted - common...

Just tried measuring voltages on the four pins, either getting zero volts or fluctuating voltages across the pins. Makes me think there's a BMS to contend with, may not be possible to use own battery... also discussed here: https://www.pedelecs.co.uk/forum/threads/swytch-battery-diy-upgrade.45488/

I also want to change out the battery, I have a large capacity 36V. I'm not sure what gen my system is, but only a year old or so (pics attached). I have the handlebar mount, the battery has 4 spade connectors (female), and the 2 charging ports. I was going to solder female spade connectors to...

Hi ...I'm new to the forum. First build but I've a feeling not my last! I've always liked the old kona full suspension bikes, so I picked up a 2005 dawg. It's pretty mint, only issues are due to lack of use but easy to sort out. My hope is to make this as light as possible.... I had a hardtail...