I can attest that the blade battery doesn’t seem to care if you take it all the way to 100% or drop it as low as 5% regularly. I’ve had my car for over 3 years now, and the battery degradation has been negligible. I’ve lost 1% over all this time, and both our cars (BYD HAN and Tang) are consistently allowed to drop under 10% before we decide to go charge them back to 100%. Granted, we live in the Caribbean, so we don’t have to deal with cold weather ever.