452e0d97_HAL_0_5_14_Specification__Description
[Key (type)] battery.charge_level.percentage (int) [Mandatory] No [Description] 
Charge, normalised to percent. This is useful if an application does not want to process the raw values and do all the extra checks on the result. This key is not present for invalid data.
HAL 0.5.14 Specification
Description