The operating temperatures of lithium ion batteries are there for your safety and probably include a margin. You’ll likely find them listed in the manual. They also have different tolerances for temperature while, charging, idle storage, or discharging. With that said, exceed them at your own risk. If I was in your situation, I personally would look for a bike with a removable battery that I can charge indoors. This way you also won’t have to deal with the performance hit that comes from cold weather operation. If you are dead set on a bike with an integrated battery, I own one and I bring it in from the garage during cold spells. No risk of overheating where I am. It’s inconvenient having my bike sitting in my office/bedroom, but if it’s just a few weeks out of the year, I can live with it.

The only reference to a manual i could find for that ebike is the “New York Ebike Battery Operating Manual”, which seems to be Velotric’s answer for New York State’s S7503B bill from 2024, mandating that ebike sellers provide a manual.

The document has this to say:

5. The charger is designed for indoor use only. Always charge the battery in a well-ventilated room with a smoke detector, and the ideal charging temperature for the battery is between 50°F and 77°F (10°C to 25°C).

6. The lithium battery’s limit charging temperature range is between 41°F and 86°F (5°C to 30°C). When the internal battery temperature exceeds this range, charging will automatically stop and enter protection mode.

It seems that this 10-25 C recommended limit is only for when charging the battery, not for general storage. For storage, this manual is silent as to what happens at different temperatures, but you must remember that this is a bicycle: a mode of transportation which can and will find itself exposed to the elements, come rain or sunlight.

As a general rule for li ion batteries, the ideal storage temperature is somewhere between -20 to 25 C, to minimize self discharge. Warmer storage will mean faster aging of the battery cells, but it would not imply some sort of future sudden and catastrophic failure. All batteries are mortal.

These charging and storage temperatures are further still distinct from the operating temperatures, meaning when power can be drawn from the battery.

As for the mechanical components of the bike, those will have the same, wide temperature range as storage as non-electric bicycle. After all, it’s mostly metal with some rubber and plastics. What will happen, though, with exposure to sudden temperature changes – ie bringing a bicycle from a cold, 5 C cellar to the outdoors when it’s 45 C – is that some plastics and lubricants will fail quicker. This is not specific to ebikes at all.

For your case, this uninsulated shed will not be ideal, and this particular ebike model does not have a quick-remove battery. If it did, my advice would be to bring the battery indoors to charge and store it, since 50 C is inappropriate for charging. But barring that, can this shed receive improved airflow? Or perhaps the bike can be chained to the shaded wall outside of the shed?

Don’t charge your battery at extreme temperatures (freezing or roasting) and consult your manual about safe operating temperatures.

I can tell you when it is freezing, your battery will definitely suffer depleted range. If you operate it in extreme temperatures, bring the battery back inside and allow it to return to a safe temperature before you attempt to recharge.

These are partly why I ended up ditching my ebike in favor of a regular bike most of the time: It’s just less to manage and stress about. My legs work at any temperature and won’t burst into flames (though sometimes when I am tired or too beat up, I wimp out and take something that has its own power).

Is the battery removable?

I’m in the upper Midwest (100+ highs and -40 lows) with no garage and keep my e-bike in a shed, but I take the battery inside after each ride and wait for it to reach room temp before charging.

The bike should be fine. The battery may have some issues