Originally Posted by Cumbacheech
...I was just wondering if there would be any issue by having the battery laying on its back instead of standing up and down... Have you looked into that? ...
It's been answered before but just to be clear:
These batteries are LiFeP04 electrode based. They are lithium ion batteries. This is why they weigh so much less and are so small. What makes them different is that they have a very specific type of electrode. So unless you feel like you need to keep your cellphone upright, you'll be fine.