Hi Zeecue,
Presumably you don't like using LiPo batteries at a low temperatures because you are concerned about stressing, or even damaging them. If that is the case, don't worry.
So long as the batteries are above a critical temperature, which IIRC is around 0 degC (TBC), they will be fine.
A lower temperature does mean that the battery will have less capacity, its terminal voltage will be lower, and its internal resistance will increase, but not enough to cause a problem in most applications.
But the ironic thing is that batteries self-heat anyway when they are sourcing current, especially in power tools, so effectively there is a heater already built in. It's the battery core temperature that counts, not the case temperature, although the two are related.
In general, with most components, the biggest negative impact on reliability is temperature.
If you would like further information on batteries, including LiPo, just Google, Battery University for a well-written guide.
PS: In certain products like, mobile phones, e-cigarettes, laptops, and power tools, the batteries have a hard time. The charging and discharging regime is designed to give maximum capacity, rather than good battery life, so in these applications battery life is quite limited anyway.