I don't think it will impact the Mobius' useful life expectancy much ( keeping the time) as a dashcam. The main concern is over charging in freezing temperatures - a Mobius that is turned off and connected to a live power source for example. The charging heat inside the Mobius might not overcome the freezing temperatures.
Thermal shock is a problem for just about anything.
The issue is not the life expectancy of the Mobius, it is the life expectancy and safety of the battery. And the main concern is not "over charging" in freezing temperatures, it is charging of any sort below freezing (0ºC - 32ºF).
@Signhere, I previously suggested that you get the facts rather than use rationalization or statements such as "I don't think", etc. Respectfully, you seem to be ignoring the facts. In
post #1105 I quoted Isador Buchmann's very clear explanation of what happens when you charge a lithium battery below freezing and why it is not a good practice. Actually, his exact words are "
cannot be charged below 0°C (32°F)". Consider reading the full text it was extracted from in the link I provided.
Most people seem to be aware that lithium-ion batteries can present safety issues or that they can lose the ability to accept a charge when not maintained properly but many find the processes involved to be mysterious. It is really very simple and straightforward however and both of those problems are related.
In a lithium-ion rechargeable battery both the positive electrode (cathode) and the negative electrode (anode) can bind lithium ions from lithium oxide that migrate back and forth between the cathode and anode during the charging and discharging process. When the battery is discharging, the lithium ions moving back to the cathode release energy in the process and this is how the battery powers your device.
Unfortunately, lithium-ion batteries have the propensity to form lithium metal from the lithium oxide ions over time and the depositing of lithium metal can be dramatically accelerated when the battery comes under stress from shock, vibration, improper charging, over-discharging and extremes of heat or cold.
When the lithium ions within the battery convert to lithium metal deposits (lithium plating) there are then fewer and fewer lithium-ions available for the process of storing and transferring energy to your device as more and more lithium metal forms. This is one of the primary things that is happening when the battery begins having trouble holding a charge. Most of the time, you'll just end up with dramatically shortened battery life or maybe a swollen battery but at a certain point, this plating process can result in physical damage to the battery that can even cause a short circuit. Unfortunately, lithium metal is highly flammable and so this can ultimately result in a fire, or worse, in extreme cases, an explosion if the electrolyte package overheats, bursts and forms a mist in the air where a lot of oxygen suddenly becomes available to the reaction. Thankfully, these kind of extreme events are rare but they happen enough that one should not ignore this issue, especially in the stressful and constantly changing environment of an automobile.
Since it known that charging a lithium battery when it is below freezing causes and even accelerates the deposition of lithium metal, this is why it should not be done.
