Yes you can.
3.6V and 3.7V are the same (approximated) Voltage. Most say 3.6, some say 3.7.
Thanks guys for the quick responses, much appreciated, will buy the i4 now!
is a good source for nominal voltages
Thanks, just having a read of the table now on the website.
As you can tell I am an ameture torchfanatic, still learning!
you are welcome. Batteries are a whole subject on their own, fairly interesting but it can get complex once you get into the chemistry part of it.
Welcome to BLF, you will see that the folks on here are very helpful and kind people.