It is common to use electrics in the news print paper roll handling in the US - we use press-on solid tire forklifts vs pneumatic tire lifts - the press on sold units typicall have space for larger batteries than pneumatic tire units. Which means we are able to install a larger kwh battery to provide longer run time per battery charge. But we use a lot of 36/48 volt batteries and the rest of the world is going to 80 volt. Either way you go get a unit with the largest battery compartment & battery in any lift you consider to get max run time/charge. i can't really give you a direct idea as to how man kwh you might need as batteries in the US are rated on a 6 hr. discharge cycle & the rest of the world tends to use a rating based on 5 hour discharge rates. Your lift truck supplier should be able to help. They would need to know what specifications (lift height, options & attachment specs, tire requirement (alway a good idea to get a high durometer tire) that has low rolling resistance, this will help reduce battey drain while traveling and information
on your application (operating environment, ramps if any, jobs the lift will be doing, like trailer, loading, stacking, unstacking, unloading, stacking or moving rolls to machinering and work duty cycle (actual work hours per day based on your existing lift truck hour usage, etc.). Finally, the attachment type you are planning to use - there are development in attachments and hosing for teh attachments that can help reduce battery power drain check with you attachment/lift truck supplier as to what they have available Cascade and Bolzoni are good places to start their maybe be others. Finally, don't go the least expensive route and deal with a company that has sold many units into the paper handling industry - get references - trucks from China might not be a good choice.
That is my 3-1/2 cents worth of advise.