Used to use DPD in a former life.
Their web site says batteries up to 100Wh are OK in equipment.
Lithium Batteries
"For batteries manufactured since January 2009, the watt-hours are marked on the outside of the battery.
If the watt-hours are not marked on the battery, use the formula Ampere-hours x Voltage.
Laptops, mobile phones and other small consumer electronics have batteries with less than 100Wh (exclusions apply, please click
here)."
I imagine that few if any laptops will have batteries of more than 100Wh.
There is also a Cell limit of 20Wh. No idea how you are supposed to figure that out.