I collected this today, seller did say it was complete and working but the battery was scrap. He was right - it's dead.

Spec 36 volt, handlebar control has 0-3 scale on the LED power meter (off + 3 speeds), front motor, front suspension (crude and worn), oversized 26" tyres, the frame folds in half, originally sold by the TV shopping channels & similar and comments I can see online say it's a very basic bike. I'm assuming speed control not current control due the age of the bike.

Should be a fun project 😄

Edited Tuesday at 21:021 day by Scorpio

The frog battery is dead, with the charger connected it shows 41.5 volts, as soon as I disconnect the charger the battery drops to 41.2 volts.

On the bike, the controller powers up ok but as soon as I start to pedal the motor kicks once then the system shuts down.

Turning the bike upside down, pedalling drives the front motor ok so at least the electronics are working...

I was hoping I could leave the controller in the frog base and add a rack battery I have. A shame the frame is drilled for a rack but the brake caliper blocks the mounting on one side. I suspect I'll end up using the drilled rack mount on the "easy" side and make up a shaped plate for the brake side (remove front brake mounting bolt, install custom rack mounting using "standard" rack mount + longer bolt to hold the plate & brake caliper). It feels like a lot of work for what should have been a plug & play rack ☹️

Edited Tuesday at 21:211 day by Scorpio

You can get those batteries from Aliexpress for well under £200. Here's one. Have a search around to find a cheaper one.

36V 48V Li-ion E-Bike Batteries Pack 10.4ah 12ah 12.8ah 14ah for Magnum Mountain Seat Post Electric Bike Battery A2B Kuo Akku

Very few OEM hub bikes and cheap China bikes will have current control systems, occasionally a sensible seller/producer will use a KT system but this is rare so 99.99% of hub bikes will have crappy speed control and that will also include mid drive bikes that don't use Torque sensing.

Is this the same sort of battery ? https://www.yosepower.co.uk/collections/e-bike-battery/products/36v10ah-seat-tube-li-ion-e-bike-battery

Thanks everyone, apologies for the slow reply, for some reason I didn't get notifications about your posts.

I'm in Europe so it's easier for me to buy there not in UK, I see Yose.EU have the same frog battery as Yose.Uk (price is 189 Euros, more expensive than the £149 UK sale price). Plenty of £10 / 10% discount codes I can use so that's an option https://yosepower.com/products/36v-10-4ah-seat-tube-battery

I can't see me keeping this bike for long which is why I'm considering transferring a decent used rack battery from the bike I plan to keep then buying an upgraded battery for that. If I do that I need to find a way to fiit a rack onto the new bike...

I'll start a new thread about the possible battery upgrade.

2 hours ago, Scorpio said:

Thanks everyone, apologies for the slow reply, for some reason I didn't get notifications about your posts.

I'm in Europe so it's easier for me to buy there not in UK, I see Yose.EU have the same frog battery as Yose.Uk (price is 189 Euros, more expensive than the £149 UK sale price). Plenty of £10 / 10% discount codes I can use so that's an option https://yosepower.com/products/36v-10-4ah-seat-tube-battery

I can't see me keeping this bike for long which is why I'm considering transferring a decent used rack battery from the bike I plan to keep then buying an upgraded battery for that. If I do that I need to find a way to fiit a rack onto the new bike...

I'll start a new thread about the possible battery upgrade.

You can use most racks on a bike with disc brakes if you use a bit of thick-walled tube as a spacer/stand-off.