The new LP-E17 Lithium-Ion Battery Pack is compatible with the optional LC-E17 charger. The battery is included with the cameras and offered here as a spare or replacement part.
Compatibility:
EOS Rebel T6i
EOS Rebel T6s
EOS Rebel T7i
EOS Rebel SL2
EOS 77D
EOS T6
EOS M3
EOS M5
EOS RP