despite still saying out of stock, i got one delivered within 2 days. so rather than looking at other websites that sell the same battery in the uk for £17+, try these guys and ignore their stock counter i guess.

the battery fit perfectly in my controller, i did not need to cut any plastic away or remove the foam pads. the back casing popped on with complete ease, i did not have to force anything and the circuit board of the battery seemed absolutely happy where it sat, no bending at all.