RAVPower via Amazon has the RAVPower 2 x LP-E17 Batteries with Micro USB Charger for only $14.99, after you select a $5 coupon savings checkbox.
This is a great deal for 2 LP-E17 batteries (3rd party) with a Micro USB Charger, these batteries fit the EOS RP, M3, M5, M6, Rebel SL2, Rebel T6s, Rebel T6i, Rebel T7i, and 77D.
This is sold by RAVPower Direct and Fulfilled by Amazon.