"I usually don't trust lithium rechargeable specs until I charge and discharge them three times before doing the "actual" testing for numbers. Your results seem plausible, but I'm still a little skeptical."
"I've wondered if lining the case with aluminized mylar as a radiative heat reflector would help. I experimented with an emergency space blanket recently, and its effect was really noticeable in my living room. It's also very, very light."