Magma CB264 User Manual page 41

M A G M A
For Batteries Rated in Watt Hours:
If the batteries are rated by the vendor in Watt Hours, then simply
multiply the number of desired hours of use by 100 Watts to get total
Watt Hours rating requirement.
If you want to run a DC powered 2 slot chassis for up to 4 hours: 4
hours x 100 Watts = 400 Watt Hours is required for the selected battery
set.
33
Appendix B DC Power Information