Fri Dec 07, 2018 5:07 am
Any. Just be sure to read either the data sheet for it (if you bought it new and it has one) or otherwise google safe temperature limits of generic batteries.
Regardless of what kind of battery you use, you'll need to allow it some way to dissipate heat, vent holes are usually enough, unless you are pushing the Pi hard and it is also heating up the ambient temperatures, in which case, a fan may be necessary.
Google is ubiquitous - learn to use it!
https://opensource.com/life/16/10/how-ask-technical-questions