Giant Reign E+ cold weather issues

[maxcycles]

One of my favorite things to do this time of year is ride an ebike in the snow, and generally when it's several degrees (F) below freezing so that the ground is hard/fast at my local trails. I was out riding my Reign e+ this afternoon in 20F temps, and the battery suddenly died presumably because of the temperature.

Anyone had issues with their Giant batteries (or any brand for that matter) dying in the cold? I had a Shimano equipped bike previously and had no issues riding it in similar temperatures. Anyone found a work around to keep them warm? Thanks

 

[Twisted Fork]

I’ve ridden on 2 different batteries on my Trance in -25 Celsius (-13 Fahrenheit) several times without issues. I avoid stopping for more than a couple of minutes at a time though, because I understand the BMS is supposed to shut the battery down once it’s internal temperature goes below -20C.

I doubt that the neoprene downtube sleeves help much at all with retaining battery heat, as the aluminum frame would just rapidly conduct the heat away to other exposed parts of the frame. But figure it can’t hurt, and it helps keep crud off the frame, so I sometimes use one anyways. Might help a tiny bit on a carbon frame.

 

[Bndit]

That kind of temperatures shouldn't be any problem to the battery, maybe there's some other problem or the battery is faulty? I had just my 8 months old Shimano battery replaced because it started give error code E914 after first cold ride (-10 celsius) Never had issues with Specialized or Bosch batteries. Though Specialized battery died after I sold the bike ...