At last, I have managed to get a new battery from UrbanMover
It turns out the original 12Ah li-pol battery wasn't all it was cracked up to be - apparently the battery manufacturer (GE) admitted that it wasn't a full 12Ah and that there was a problem with the flat wire connecting the cells (burnt out due to over-ampage) and the maintaining circuit inside wasn't able to cope with the full ampage the battery can output, UrbanMover had to recall a large amount of the li-pol batteries.
The one I have been given now is a new 9Ah li-ion made by Panasonic but UM have in their tests been getting 10Ah from them so Panasonic have been understating the performance. They're also working with Lithium-Phosphate batteries because they can output much more amps than poly or ion types, meaning quicker acceleration.
Oh and they're doing away with key-switches on the batteries because of too many people losing them, now they just have a rocker switch.
My new battery is charging up right now and will be taking it for a burn sometime tonight but I probably won't get a full range out of it because it needs around 15 charge/discharge cycles to gain it's full capacity. He also gave me a new saddle after my original one took damage from my short trip over the handlebars.
The new UM36X is in a larger framesize (19" or 21") and matt black, partly because they couldn't sell the smaller frame sized bikes to the Americans, I didn't get to see one because the demand is outstripping supply, the dealers have said they don't want the silver/green ones anymore. Their website is getting updated over the next week or so and I'm looking forward to seeing it.
It turns out the original 12Ah li-pol battery wasn't all it was cracked up to be - apparently the battery manufacturer (GE) admitted that it wasn't a full 12Ah and that there was a problem with the flat wire connecting the cells (burnt out due to over-ampage) and the maintaining circuit inside wasn't able to cope with the full ampage the battery can output, UrbanMover had to recall a large amount of the li-pol batteries.
The one I have been given now is a new 9Ah li-ion made by Panasonic but UM have in their tests been getting 10Ah from them so Panasonic have been understating the performance. They're also working with Lithium-Phosphate batteries because they can output much more amps than poly or ion types, meaning quicker acceleration.
Oh and they're doing away with key-switches on the batteries because of too many people losing them, now they just have a rocker switch.
My new battery is charging up right now and will be taking it for a burn sometime tonight but I probably won't get a full range out of it because it needs around 15 charge/discharge cycles to gain it's full capacity. He also gave me a new saddle after my original one took damage from my short trip over the handlebars.
The new UM36X is in a larger framesize (19" or 21") and matt black, partly because they couldn't sell the smaller frame sized bikes to the Americans, I didn't get to see one because the demand is outstripping supply, the dealers have said they don't want the silver/green ones anymore. Their website is getting updated over the next week or so and I'm looking forward to seeing it.