Battery swollen

[Mikeboscky]

My TB47 has around 10 charges on it now, it appears to have an small bulge on the bottom of the battery, or is it supposed to look like this?

 

[AeroMirage]

Normal. They all have a slight bulge on the bottom.

 

[Steve@AerialImagesPro]

All my batteries have the bulge as well. It's normal. Really good to ask though. If the battery is truly 'bulged' it will show on the sides as well. Keep in mind, they will bulge during use so when you land and take a battery out, you will see some bulge. It's only if the bulge doesn't go away that you have to worry.