Yes you can my battery charger had an short in it and I put mobile battery in the freezer over night and my fone last the whole next day. Even on myth busters they prove it as true
Can You Freeze A Cell Phone Battery?
Freezing the battery may work, but it may also cause the battery to explode. Do that at your own risk. Do you need new cell phone batteries?
It's a risky thing but may have good results
You can freeze anything but in my experience it don't work to try to regenerate the memory, if its one of the older type of NIMH batteries then they are only good for around 300/400 charges anyway (lithium more like a 1000) , don't know about everyone else but mine goes on everynight. The prce of mobile phone batteries are so cheap now might as well by another see here - mobile phone batteries
You should never freeze a cell phone battery. It can ruin your battery! For instructions on properly caring for your cell phone batteries visit the Battery Guide on www.batteries4less.com