The Enersys CYCLON® 8Ah rechargeable sealed lead cylindrical battery has a nominal voltage of 2V. It has a lead-acid chemical composition with tab terminals. It is equivalent to other cylindrical cell types more versatile in their charging requirements than most other sealed lead acid types and is less susceptible to overcharge. This is designed for a cyclic application.
Warning
Do not charge in a sealed enclosure.

Consists of a wound electrode in a polypropylene case in a metal can
Cost effective
Power density
High stability
Long life
Low maintenance
Metal outer case and spiral construction
Rugged construction
Operating temperature ranging between -65°C and 80°C